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Episode
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| 00 | The Honest Supermarket: What's Really in Our Food? (7)7.0 | |||||||||||||||||||||||||||||||||||||||||||
| 01 | The World of Buckminster Fuller (8.6)8.6 | Atlantis Uncovered (6.9)6.9 | Mega-Tsunami: Wave of Destruction (8.1)8.1 | Freak Wave (8.2)8.2 | The Big Chill (7.1)7.1 | The Truth About Vitamins (7.2)7.2 | Tsunami: Naming the Dead (7.5)7.5 | Survivors Guide to Plane Crashes (7)7.0 | Everest: Doctors in the Death Zone - Part 1 (8.3)8.3 | The President's Guide to Science (7.9)7.9 | Do I Drink Too Much? (6.7)6.7 | Back from the Dead (8.2)8.2 | Do You See What I See? (7.8)7.8 | The Truth About Looking Young (7.4)7.4 | What's Killing Our Bees? A Horizon Special (8.2)8.2 | Should I Eat Meat? The Big Health Dilemma (7.5)7.5 | The Immortalist (8)8.0 | ADHD and Me with Rory Bremner (6.8)6.8 | My Amazing Brain: Richard's War (8.2)8.2 | We Need to Talk About Death (7.9)7.9 | Inside the Social Network: Facebook's Difficult Year (6.3)6.3 | |||||||||||||||||||||||
| 02 | Atlantis Reborn (5.6)5.6 | The Ape That Took Over the World (7.6)7.6 | Stone Age Columbus (6.5)6.5 | The Bible Code (7.9)7.9 | King Solomon's Tablet of Stone (8.4)8.4 | The Hawking Paradox (7.4)7.4 | Chimps Are People Too (8.2)8.2 | Everest: Doctors in the Death Zone - Part 2 (7.8)7.8 | How Mad Are You?: Part 1 (7.4)7.4 | The Secret You (7.5)7.5 | The Death of the Oceans? (7.7)7.7 | Seeing Stars (7.7)7.7 | Mission to Mars: A Horizon Special (7)7.0 | Monitor Me (8.2)8.2 | Should I Eat Meat? How to Feed the Planet (8)8.0 | Project Greenglow: The Quest for Gravity Control (6.3)6.3 | Why Did I Go Mad? (7.2)7.2 | The 250 Million Pound Cancer Cure (7.6)7.6 | ||||||||||||||||||||||||||
| 03 | The Blind Watchmaker (8.2)8.2 | The Lost World of Lake Vostok (7.4)7.4 | Homeopathy: The Test (8.1)8.1 | Derek Tastes of Earwax (8.5)8.5 | The Mystery of the Human Hobbit (7.1)7.1 | The World's First Face Transplant (6.8)6.8 | How to Kill a Human Being (7.5)7.5 | How Mad Are You?: Part 2 (7.5)7.5 | What Happened Before the Big Bang? (7.7)7.7 | The Nine Months That Made You (7.2)7.2 | Eat, Fast and Live Longer (7.8)7.8 | Defeating the Hackers (6.8)6.8 | Allergies: Modern Life and Me (6.9)6.9 | The Mystery of Dark Energy (7.2)7.2 | Strange Signals from Outer Space (6.7)6.7 | How to Build a Time Machine (7.2)7.2 | Cannabis: Miracle Medicine or Dangerous Drug? (7.3)7.3 | |||||||||||||||||||||||||||
| 04 | Strangeness Minus Three (8.1)8.1 | Professor Hawking's Universe (6.9)6.9 | Vanished: The Plane That Disappeared (8)8.0 | The Death Star (7.5)7.5 | The Day the Earth Nearly Died (8.2)8.2 | What Really Killed the Dinosaurs? (7.2)7.2 | Human v2.0 (6.9)6.9 | Total Isolation (7.5)7.5 | Jimmy's GM Food Fight (6.8)6.8 | Who's Afraid of a Big Black Hole? (8)8.0 | Is Seeing Believing? (7.9)7.9 | The Core (7.4)7.4 | How Big Is the Universe? (7.7)7.7 | Dinosaurs: The Hunt for Life (7)7.0 | Inside the Dark Web (7.3)7.3 | Oceans of the Solar System (7.6)7.6 | Spina Bifida and Me (8)8.0 | Chris Packham: 7.7 Billion People and Counting (7.9)7.9 | ||||||||||||||||||||||||||
| 05 | No Ordinary Genius, Part One (8.3)8.3 | The Man Who Lost His Body (7.9)7.9 | The Secret Treasures of Zeugma (9.5)9.5 | Cloning the First Human (9)9.0 | The Secret of El Dorado (7.5)7.5 | Making Millions the Easy Way (6.9)6.9 | The Great Robot Race (6.6)6.6 | What on Earth Is Wrong with Gravity? (7.6)7.6 | Do You Know What Time It Is? (8.7)8.7 | Why Do We Talk? (8)8.0 | Miracle Cure? A Decade of the Human Genome (6.9)6.9 | Are You Good or Evil? (7.5)7.5 | How Small Is the Universe? (7.6)7.6 | Comet of the Century: A Horizon Special (7)7.0 | Ebola: The Search for a Cure (7.7)7.7 | The End of the Solar System (6.7)6.7 | Jupiter Revealed (8)8.0 | Addicted to Painkillers? Britain's Opioid Crisis (6.7)6.7 | ||||||||||||||||||||||||||
| 06 | Joey (9.4)9.4 | No Ordinary Genius, Part Two (8.3)8.3 | The Time Lords (8)8.0 | Dawn of the Clone Age (7.8)7.8 | The Midas Formula (8.2)8.2 | Helike - The Real Atlantis (7.1)7.1 | The Mystery of Easter Island (7.6)7.6 | Time Trip (7.3)7.3 | Saturn: Lord of the Rings (7.4)7.4 | Pandemic (5.8)5.8 | Is Alcohol Worse Than Ecstasy? (7.5)7.5 | Allergy Planet (6.9)6.9 | How Long Is a Piece of String? (7.1)7.1 | Asteroids: The Good, the Bad, and the Ugly (8.1)8.1 | Fukushima: Is Nuclear Power Safe? (6.9)6.9 | Defeating the Superbugs (7.6)7.6 | Sugar v Fat (6.8)6.8 | Is Your Brain Male or Female? (6.8)6.8 | Should We Close Our Zoos? (8.4)8.4 | Cyber Attack - The Day the NHS Stopped (7.5)7.5 | Stopping Male Suicide (6)6.0 | Coronavirus Special - Part 1 (7.2)7.2 | ||||||||||||||||||||||
| 07 | A Mathematical Mystery Tour (8.3)8.3 | Life and Death in the 21st Century: Living Forever (5.9)5.9 | Extreme Dinosaurs (7.4)7.4 | Volcano Hell (7.8)7.8 | Titan: A Place Like Home? (7.3)7.3 | We Are the Aliens (7.1)7.1 | How to Make Better Decisions (6.8)6.8 | Where's My Robot? (8.1)8.1 | How Many People Can Live on Planet Earth? (8.1)8.1 | Deepwater Disaster: The Untold Story (6.8)6.8 | The Hunt for the Higgs (7.6)7.6 | The Truth About Meteors (7.5)7.5 | Swallowed by a Sink Hole (6.9)6.9 | Secrets of the Solar System (7)7.0 | How to Find Love Online (6.9)6.9 | A Week Without Lying - The Honesty Experiment (6.1)6.1 | Hubble: The Wonders of Space Revealed (7.7)7.7 | |||||||||||||||||||||||||||
| 08 | Noah's Flood (7.6)7.6 | Supermassive Black Holes (7.4)7.4 | Averting Armageddon (7)7.0 | The Moscow Theatre Siege (7.3)7.3 | Dr Money and the Boy with No Penis (7.8)7.8 | The 7/7 Bombers: A Psychological Investigation (8.3)8.3 | My Pet Dinosaur (6.9)6.9 | How to Live to 101 (7.5)7.5 | Why Are Thin People Not Fat? (7)7.0 | The Secret Life of the Dog (7.7)7.7 | What Is One Degree? (6.9)6.9 | Playing God (8.1)8.1 | The Creative Brain: How Insight Works (7.6)7.6 | Man on Mars: Mission to the Red Planet (7.3)7.3 | Ice Station Antarctica (7.6)7.6 | Dawn of the Driverless Car (7)7.0 | Toxic Town: The Corby Poisonings (6.1)6.1 | |||||||||||||||||||||||||||
| 09 | The Pleasure of Finding Things Out (8.8)8.8 | The Strange Life and Death of Dr. Turing (8)8.0 | Fermat's Last Theorem (7.6)7.6 | Ice Mummies: The Ice Maiden (7.7)7.7 | The Boy Who Was Turned Into a Girl (8.9)8.9 | The Lost Pyramids of Caral (8.3)8.3 | Dirty Bomb (8.3)8.3 | The Atkins Diet (6.3)6.3 | Global Dimming (7.7)7.7 | The Ghost in Your Genes (7.8)7.8 | Are We Alone in the Universe? (7.5)7.5 | Cannabis: The Evil Weed? (6.6)6.6 | Why Do Viruses Kill? (7.6)7.6 | What is Reality? (7.9)7.9 | The Truth About Exercise (7.6)7.6 | How to Avoid Mistakes in Surgery (7.7)7.7 | The Power of the Placebo (7.5)7.5 | Aftershock: The Hunt for Gravitational Waves (6.5)6.5 | Curing Alzheimer's (7.3)7.3 | 10 Things You Need to Know About the Future (7.3)7.3 | The Placebo Experiment: Can My Brain Cure My Body? (7.5)7.5 | The Restaurant that Burns Off Calories (5)5.0 | ||||||||||||||||||||||
| 10 | The Mysterious Mr Tesla (8.2)8.2 | Atlantis Reborn Again (6.5)6.5 | Death of the Iceman (7.1)7.1 | Secrets of the Star Disc (7.1)7.1 | Einstein's Unfinished Symphony (8.1)8.1 | How Much Is Your Dead Body Worth? (7.4)7.4 | Why Do We Dream? (7.5)7.5 | Pill Poppers (7.8)7.8 | Science Under Attack (7.2)7.2 | Solar Storms: The Threat to Planet Earth (7.5)7.5 | The Truth About Taste (6.8)6.8 | How You Really Make Decisions (7.5)7.5 | Dancing in the Dark - The End of Physics (7)7.0 | E-Cigarettes: Miracle or Menace? (7.2)7.2 | Body Clock: What Makes Us Tick? (6.5)6.5 | The Great British Intelligence Test (6.4)6.4 | ||||||||||||||||||||||||||||
| 11 | To Engineer Is Human (8.4)8.4 | Ice Mummies: Frozen in Heaven (8)8.0 | Life on Mars (7.3)7.3 | Parallel Universes (8)8.0 | The Day We Learned to Think (7.5)7.5 | The Dark Secret of Hendrik Schön (7)7.0 | Einstein's Equation of Life and Death (8.2)8.2 | Space Tourists (7.6)7.6 | Mad But Glad (7.9)7.9 | How Does Your Memory Work? (6.8)6.8 | Can We Make a Star on Earth? (8.3)8.3 | Don't Grow Old (7.8)7.8 | The Secret World of Pain (8.2)8.2 | Out of Control? (7.5)7.5 | The Age of Big Data (6.8)6.8 | Living with Autism (6.7)6.7 | 70 Million Animal Mummies: Egypt's Dark Secret (7.4)7.4 | Why Are We Getting So Fat? (6.9)6.9 | Avalanche: Making a Deadly Snowstorm (7)7.0 | Coronavirus Special - Part 2 (6.9)6.9 | ||||||||||||||||||||||||
| 12 | A Time to Be Born (8)8.0 | AIDS: A Strange and Deadly Virus (7.3)7.3 | Psychedelic Science (7.8)7.8 | From Here to Infinity (8.1)8.1 | The Dinosaur That Fooled the World (7.8)7.8 | Trial and Error (7.2)7.2 | Living with ADHD (7.6)7.6 | Moon for Sale (7.8)7.8 | The Secret Life of Your Body Clock (7.7)7.7 | To Infinity and Beyond (7.5)7.5 | Surviving a Car Crash (6.5)6.5 | The Truth About Fat (6.9)6.9 | Tomorrow's World: A Horizon Special (7.8)7.8 | The £10 Million Challenge (7.9)7.9 | Is Binge Drinking Really That Bad? (7.4)7.4 | Sports Doping - Winning at Any Cost? (6.6)6.6 | What Makes a Psychopath? (6.2)6.2 | Vitamin Pills: Miracle or Myth? (6.8)6.8 | Pluto: Back from the Dead (7.7)7.7 | |||||||||||||||||||||||||
| 13 | Resurrecting the Dead Sea Scrolls (7.4)7.4 | Supervolcanoes (8)8.0 | The Mystery of the Miami Circle (7.2)7.2 | The Fall of the World Trade Center (5.4)5.4 | Earthquake Storms (7.9)7.9 | Neanderthal (7.3)7.3 | A War on Science (8)8.0 | Battle of the Brains (7.8)7.8 | What's the Problem with Nudity? (6.9)6.9 | What Makes a Genius? (7.1)7.1 | How to Mend a Broken Heart (8)8.0 | Global Weirding (7.6)7.6 | The Secret Life of the Cat (7.3)7.3 | Where Is Flight MH370? (7.4)7.4 | The Trouble with Space Junk (7.9)7.9 | Inside CERN (6.8)6.8 | Mars: a Traveller's Guide (7)7.0 | Diagnosis on Demand? The Computer Will See You Now (7.9)7.9 | Pandemic: A Horizon Guide (7)7.0 | |||||||||||||||||||||||||
| 14 | Nice Guys Finish First (8.3)8.3 | Auschwitz: The Blueprints of Genocide (7.6)7.6 | Assault on the Male (9.4)9.4 | Miracle in Orbit (8.6)8.6 | The Missing Link (7.7)7.7 | Archimedes' Secret (7.7)7.7 | Life on Mars (7.5)7.5 | T.Rex: Warrior or Wimp? (6.6)6.6 | An Experiment to Save the World (7.1)7.1 | The Lost City of New Orleans (8)8.0 | How to Survive a Disaster (8.1)8.1 | Did Cooking Make Us Human (7.9)7.9 | Are we still Evolving? (7.3)7.3 | The Hunt for A.I. (7.9)7.9 | Little Cat Diaries (7.2)7.2 | What's Wrong with Our Weather? (6.5)6.5 | Are Health Tests Really a Good Idea? (8)8.0 | My Amazing Twin (7.4)7.4 | Goodbye Cassini - Hello Saturn (8.4)8.4 | The Contraceptive Pill: How Safe Is It? (6.4)6.4 | Diet: A Horizon Guide (9)9.0 | |||||||||||||||||||||||
| 15 | Killer Algae (8.7)8.7 | The Mystery of the Jurassic (7.2)7.2 | The Secret Life of Caves (7)7.0 | Project Poltergeist (8.5)8.5 | Who's Afraid of Designer Babies? (7.4)7.4 | Most of Our Universe Is Missing (8)8.0 | The Six Billion Dollar Experiment (7.6)7.6 | Who Do You Want Your Child to Be? (8.8)8.8 | Is Everything We Know About the Universe Wrong? (7.5)7.5 | Predators in Your Backyard (7.4)7.4 | Defeating Cancer (6.9)6.9 | Fracking: The New Energy Rush (6.9)6.9 | First Britons (6.9)6.9 | Being Transgender (6.7)6.7 | Tim Peake Special: How to Be an Astronaut (7.9)7.9 | |||||||||||||||||||||||||||||
| 16 | Man in Space (7.8)7.8 | The Race for the Double Helix (7.4)7.4 | Icon Earth (9.8)9.8 | Killer Lakes (7.4)7.4 | God on the Brain (7.8)7.8 | The Truth of Troy (7.3)7.3 | The Lost Civilisation of Peru (7.8)7.8 | How to Commit the Perfect Murder (6.9)6.9 | Why Can't We Predict Earthquakes? (6.4)6.4 | Japan Earthquake: A Horizon Special (7.5)7.5 | The Transit of Venus: A Horizon Special (8.3)8.3 | Swallowed by a Black Hole (7.8)7.8 | OCD: A Monster in My Mind (7.4)7.4 | The Lost Tribes of Humanity (8.2)8.2 | Jimmy Carr & the Science of Laughter: A Horizon Special (5.9)5.9 | |||||||||||||||||||||||||||||
| 17 | Cancer Detectives of Lin Xian (8.8)8.8 | Einstein: The Miracle Year (7.4)7.4 | New Star in Orbit (6.3)6.3 | Snowball Earth (7.7)7.7 | The A6 Murder (8.6)8.6 | The Next Megaquake (6.7)6.7 | The Woman Who Thinks Like a Cow (7.6)7.6 | Alan and Marcus Go Forth and Multiply (8)8.0 | What Makes Us Human? (7.9)7.9 | Which Universe Are We In? (6.5)6.5 | The Wildest Weather in the Universe (7)7.0 | Clean Eating - The Dirty Truth (5.6)5.6 | ||||||||||||||||||||||||||||||||
| 18 | Inside Chernobyl Sarcophagus (7.8)7.8 | Einstein: Fame (7.6)7.6 | Mir Mortals (7.6)7.6 | The Genius Sperm Bank (8.2)8.2 | How Violent Are You? (8.1)8.1 | The Truth About Personality (7.2)7.2 | Cosmic Dawn: The Real Moment of Creation (7.3)7.3 | Clean Eating: The Dirty Truth (5.5)5.5 | Space Volcanoes (7.4)7.4 | |||||||||||||||||||||||||||||||||||
| 19 | Now the Chips are Down (8)8.0 | How to Film the Impossible (7.7)7.7 | Fallout from Chernobyl (7)7.0 | What Sank the Kursk? (7.6)7.6 | Bye Bye Planet Pluto (7.7)7.7 | Are Video Games Really That Bad? (6.7)6.7 | Hair Care Secrets (7.4)7.4 | |||||||||||||||||||||||||||||||||||||
| 20 | The Fight to Be Male (8.4)8.4 | We Love Cigarettes (8.4)8.4 | ||||||||||||||||||||||||||||||||||||||||||
| 21 | Nuclear Nightmares (7.4)7.4 | |||||||||||||||||||||||||||||||||||||||||||
| 22 | Tutankhamun's Fireball (6.7)6.7 | |||||||||||||||||||||||||||||||||||||||||||
| 23 | Killer in the Village (8.1)8.1 | |||||||||||||||||||||||||||||||||||||||||||
| 25 | The Quest for Tannu Tuva (8.7)8.7 | |||||||||||||||||||||||||||||||||||||||||||
| 28 | Beyond the Moon (8)8.0 | |||||||||||||||||||||||||||||||||||||||||||
| Avg | 8.4 | 7.8 | 8.7 | 8.0 | 8.4 | 8.8 | 8.8 | 8.2 | 7.5 | 8.0 | 7.8 | 8.0 | 8.7 | 7.8 | 8.0 | 8.0 | 7.6 | 9.8 | 7.8 | 7.8 | 7.8 | 7.2 | 7.2 | 7.8 | 7.6 | 7.6 | 7.2 | 7.6 | 7.7 | 7.2 | 7.5 | 7.6 | 7.6 | 7.5 | 7.5 | 7.4 | 7.3 | 7.2 | 7.2 | 7.1 | 7.1 | 7.9 | 7.0 | |
Rating
Watch Time
| Rank | Ep | Episode Name | Rating | Votes |
|---|---|---|---|---|
| 1 | S31E16 | Icon Earth | 9.8 | 0 |
| 1 | S37E05 | The Secret Treasures of Zeugma | 9.5 | 0 |
| 1 | S32E14 | Assault on the Male | 9.4 | 0 |
| 1 | S11E06 | Joey | 9.4 | 0 |
| 1 | SUnknoE14 | Diet: A Horizon Guide | 9.0 | 0 |
| 1 | S38E05 | Cloning the First Human | 9.0 | 0 |
| 1 | S37E09 | The Boy Who Was Turned Into a Girl | 8.9 | 17 |
| 1 | S16E17 | Cancer Detectives of Lin Xian | 8.8 | 0 |
| 1 | S18E09 | The Pleasure of Finding Things Out | 8.8 | 128 |
| 1 | S45E15 | Who Do You Want Your Child to Be? | 8.8 | 0 |
| 1 | S45E05 | Do You Know What Time It Is? | 8.7 | 86 |
| 1 | S37E15 | Killer Algae | 8.7 | 0 |
| 1 | S24E25 | The Quest for Tannu Tuva | 8.7 | 43 |
| 1 | S36E14 | Miracle in Orbit | 8.6 | 0 |
| 1 | S01E01 | The World of Buckminster Fuller | 8.6 | 0 |
| 1 | S38E17 | The A6 Murder | 8.6 | 0 |
| 1 | S40E15 | Project Poltergeist | 8.5 | 13 |
| 1 | S41E03 | Derek Tastes of Earwax | 8.5 | 0 |
| 1 | S15E20 | The Fight to Be Male | 8.4 | 0 |
| 1 | S42E20 | We Love Cigarettes | 8.4 | 15 |
| 1 | S53E14 | Goodbye Cassini - Hello Saturn | 8.4 | 26 |
| 1 | S52E06 | Should We Close Our Zoos? | 8.4 | 14 |
| 1 | S23E11 | To Engineer Is Human | 8.4 | 0 |
| 1 | S41E02 | King Solomon's Tablet of Stone | 8.4 | 13 |
| 1 | S48E16 | The Transit of Venus: A Horizon Special | 8.3 | 0 |
| 1 | S29E05 | No Ordinary Genius, Part One | 8.3 | 27 |
| 1 | S38E09 | The Lost Pyramids of Caral | 8.3 | 27 |
| 1 | S29E06 | No Ordinary Genius, Part Two | 8.3 | 22 |
| 1 | S45E11 | Can We Make a Star on Earth? | 8.3 | 46 |
| 1 | S42E08 | The 7/7 Bombers: A Psychological Investigation | 8.3 | 0 |
| 1 | S39E09 | Dirty Bomb | 8.3 | 0 |
| 1 | S21E07 | A Mathematical Mystery Tour | 8.3 | 11 |
| 1 | S22E14 | Nice Guys Finish First | 8.3 | 54 |
| 1 | S44E01 | Everest: Doctors in the Death Zone - Part 1 | 8.3 | 11 |
| 1 | S50E02 | Monitor Me | 8.2 | 13 |
| 1 | S19E10 | The Mysterious Mr Tesla | 8.2 | 0 |
| 1 | S54E01 | My Amazing Brain: Richard's War | 8.2 | 13 |
| 1 | S39E04 | The Day the Earth Nearly Died | 8.2 | 29 |
| 1 | S50E01 | What's Killing Our Bees? A Horizon Special | 8.2 | 13 |
| 1 | S23E03 | The Blind Watchmaker | 8.2 | 72 |
| 1 | S42E18 | The Genius Sperm Bank | 8.2 | 0 |
| 1 | S41E11 | Einstein's Equation of Life and Death | 8.2 | 44 |
| 1 | S43E02 | Chimps Are People Too | 8.2 | 0 |
| 1 | S39E01 | Freak Wave | 8.2 | 22 |
| 1 | S36E06 | The Midas Formula | 8.2 | 20 |
| 1 | S52E16 | The Lost Tribes of Humanity | 8.2 | 20 |
| 1 | S47E01 | Back from the Dead | 8.2 | 11 |
| 1 | S47E11 | The Secret World of Pain | 8.2 | 20 |
| 1 | S47E06 | Asteroids: The Good, the Bad, and the Ugly | 8.1 | 16 |
| 1 | S37E01 | Mega-Tsunami: Wave of Destruction | 8.1 | 33 |
| 1 | S39E03 | Homeopathy: The Test | 8.1 | 22 |
| 1 | S45E07 | Where's My Robot? | 8.1 | 12 |
| 1 | S01E04 | Strangeness Minus Three | 8.1 | 0 |
| 1 | S19E23 | Killer in the Village | 8.1 | 14 |
| 1 | S41E10 | Einstein's Unfinished Symphony | 8.1 | 50 |
| 1 | S35E12 | From Here to Infinity | 8.1 | 0 |
| 1 | S45E18 | How Violent Are You? | 8.1 | 16 |
| 1 | S46E07 | How Many People Can Live on Planet Earth? | 8.1 | 155 |
| 1 | S45E14 | How to Survive a Disaster | 8.1 | 11 |
| 1 | S48E08 | Playing God | 8.1 | 37 |
| 1 | S33E06 | The Time Lords | 8.0 | 0 |
| 1 | S51E14 | Are Health Tests Really a Good Idea? | 8.0 | 15 |
| 1 | S33E11 | Ice Mummies: Frozen in Heaven | 8.0 | 0 |
| 1 | S54E05 | Jupiter Revealed | 8.0 | 29 |
| 1 | S51E02 | Should I Eat Meat? How to Feed the Planet | 8.0 | 27 |
| 1 | S45E17 | Alan and Marcus Go Forth and Multiply | 8.0 | 12 |
| 1 | S14E19 | Now the Chips are Down | 8.0 | 0 |
| 1 | S36E13 | Supervolcanoes | 8.0 | 11 |
| 1 | S46E05 | Why Do We Talk? | 8.0 | 21 |
| 1 | S20E28 | Beyond the Moon | 8.0 | 0 |
| 1 | S52E01 | The Immortalist | 8.0 | 27 |
| 1 | S42E13 | A War on Science | 8.0 | 35 |
| 1 | S47E13 | How to Mend a Broken Heart | 8.0 | 0 |
| 1 | S37E04 | Vanished: The Plane That Disappeared | 8.0 | 0 |
| 1 | S11E12 | A Time to Be Born | 8.0 | 0 |
| 1 | S54E04 | Spina Bifida and Me | 8.0 | 0 |
| 1 | S28E09 | The Strange Life and Death of Dr. Turing | 8.0 | 0 |
| 1 | S38E11 | Parallel Universes | 8.0 | 83 |
| 1 | S42E15 | Most of Our Universe Is Missing | 8.0 | 35 |
| 1 | S42E14 | The Lost City of New Orleans | 8.0 | 0 |
| 1 | S46E04 | Who's Afraid of a Big Black Hole? | 8.0 | 46 |
| 1 | S50E12 | The £10 Million Challenge | 7.9 | 0 |
| 1 | SUnknoE15 | Tim Peake Special: How to Be an Astronaut | 7.9 | 0 |
| 1 | S46E14 | Did Cooking Make Us Human | 7.9 | 16 |
| 1 | S39E13 | Earthquake Storms | 7.9 | 14 |
| 1 | S45E01 | The President's Guide to Science | 7.9 | 16 |
| 1 | S54E13 | Diagnosis on Demand? The Computer Will See You Now | 7.9 | 0 |
| 1 | S34E05 | The Man Who Lost His Body | 7.9 | 16 |
| 1 | S49E17 | What Makes Us Human? | 7.9 | 34 |
| 1 | S47E09 | What is Reality? | 7.9 | 69 |
| 1 | S40E02 | The Bible Code | 7.9 | 0 |
| 1 | S55E01 | We Need to Talk About Death | 7.9 | 0 |
| 1 | S51E13 | The Trouble with Space Junk | 7.9 | 25 |
| 1 | SUnknoE04 | Chris Packham: 7.7 Billion People and Counting | 7.9 | 29 |
| 1 | S43E11 | Mad But Glad | 7.9 | 0 |
| 1 | S47E04 | Is Seeing Believing? | 7.9 | 34 |
| 1 | S48E14 | The Hunt for A.I. | 7.9 | 37 |
| 1 | S42E09 | The Ghost in Your Genes | 7.8 | 22 |
| 1 | S34E06 | Dawn of the Clone Age | 7.8 | 0 |
| 1 | S02E16 | Man in Space | 7.8 | 0 |
| 1 | S44E02 | Everest: Doctors in the Death Zone - Part 2 | 7.8 | 0 |
| 1 | S38E07 | Volcano Hell | 7.8 | 0 |
| 1 | S49E03 | Eat, Fast and Live Longer | 7.8 | 157 |
| 1 | S41E08 | Dr Money and the Boy with No Penis | 7.8 | 35 |
| 1 | S49E16 | Swallowed by a Black Hole | 7.8 | 43 |
| 1 | S46E10 | Pill Poppers | 7.8 | 12 |
| 1 | S48E01 | Do You See What I See? | 7.8 | 37 |
| 1 | S43E12 | Moon for Sale | 7.8 | 17 |
| 1 | S43E13 | Battle of the Brains | 7.8 | 23 |
| 1 | S46E11 | Don't Grow Old | 7.8 | 20 |
| 1 | S41E16 | The Lost Civilisation of Peru | 7.8 | 17 |
| 1 | S39E16 | God on the Brain | 7.8 | 41 |
| 1 | S33E12 | Psychedelic Science | 7.8 | 18 |
| 1 | S49E12 | Tomorrow's World: A Horizon Special | 7.8 | 18 |
| 1 | S27E18 | Inside Chernobyl Sarcophagus | 7.8 | 28 |
| 1 | S38E12 | The Dinosaur That Fooled the World | 7.8 | 0 |
| 1 | S37E14 | The Missing Link | 7.7 | 0 |
| 1 | S49E04 | How Big Is the Universe? | 7.7 | 67 |
| 1 | S42E19 | Bye Bye Planet Pluto | 7.7 | 14 |
| 1 | S46E08 | The Secret Life of the Dog | 7.7 | 50 |
| 1 | S33E09 | Ice Mummies: The Ice Maiden | 7.7 | 0 |
| 1 | S41E09 | Global Dimming | 7.7 | 30 |
| 1 | S51E05 | Ebola: The Search for a Cure | 7.7 | 11 |
| 1 | S37E17 | Snowball Earth | 7.7 | 11 |
| 1 | S21E19 | How to Film the Impossible | 7.7 | 0 |
| 1 | S48E02 | Seeing Stars | 7.7 | 22 |
| 1 | SUnknoE12 | Pluto: Back from the Dead | 7.7 | 23 |
| 1 | S47E03 | What Happened Before the Big Bang? | 7.7 | 88 |
| 1 | S49E09 | How to Avoid Mistakes in Surgery | 7.7 | 12 |
| 1 | S38E14 | Archimedes' Secret | 7.7 | 24 |
| 1 | S45E12 | The Secret Life of Your Body Clock | 7.7 | 29 |
| 1 | SUnknoE07 | Hubble: The Wonders of Space Revealed | 7.7 | 26 |
| 1 | S47E02 | The Death of the Oceans? | 7.7 | 26 |
| 1 | S52E04 | Oceans of the Solar System | 7.6 | 14 |
| 1 | S41E12 | Living with ADHD | 7.6 | 0 |
| 1 | S38E02 | The Ape That Took Over the World | 7.6 | 17 |
| 1 | S32E09 | Fermat's Last Theorem | 7.6 | 115 |
| 1 | S48E09 | The Truth About Exercise | 7.6 | 100 |
| 1 | S49E06 | Defeating the Superbugs | 7.6 | 19 |
| 1 | SUnknoE02 | The 250 Million Pound Cancer Cure | 7.6 | 11 |
| 1 | S44E05 | What on Earth Is Wrong with Gravity? | 7.6 | 75 |
| 1 | S48E07 | The Hunt for the Higgs | 7.6 | 70 |
| 1 | S52E08 | Ice Station Antarctica | 7.6 | 14 |
| 1 | S39E06 | The Mystery of Easter Island | 7.6 | 14 |
| 1 | S49E08 | The Creative Brain: How Insight Works | 7.6 | 33 |
| 1 | S43E15 | The Six Billion Dollar Experiment | 7.6 | 28 |
| 1 | S48E13 | Global Weirding | 7.6 | 0 |
| 1 | S30E14 | Auschwitz: The Blueprints of Genocide | 7.6 | 31 |
| 1 | S37E19 | What Sank the Kursk? | 7.6 | 0 |
| 1 | S49E05 | How Small Is the Universe? | 7.6 | 54 |
| 1 | S46E09 | Why Do Viruses Kill? | 7.6 | 31 |
| 1 | S42E17 | The Woman Who Thinks Like a Cow | 7.6 | 30 |
| 1 | S42E11 | Space Tourists | 7.6 | 0 |
| 1 | S32E18 | Einstein: Fame | 7.6 | 0 |
| 1 | S33E08 | Noah's Flood | 7.6 | 0 |
| 1 | S34E18 | Mir Mortals | 7.6 | 0 |
| 1 | S44E06 | Is Alcohol Worse Than Ecstasy? | 7.5 | 41 |
| 1 | S50E09 | The Power of the Placebo | 7.5 | 26 |
| 1 | S39E11 | The Day We Learned to Think | 7.5 | 12 |
| 1 | S38E04 | The Death Star | 7.5 | 19 |
| 1 | S44E08 | How to Live to 101 | 7.5 | 13 |
| 1 | S44E09 | Are We Alone in the Universe? | 7.5 | 38 |
| 1 | S51E01 | Should I Eat Meat? The Big Health Dilemma | 7.5 | 42 |
| 1 | S53E06 | Cyber Attack - The Day the NHS Stopped | 7.5 | 0 |
| 1 | S54E09 | The Placebo Experiment: Can My Brain Cure My Body? | 7.5 | 13 |
| 1 | S49E07 | The Truth About Meteors | 7.5 | 13 |
| 1 | S45E03 | How Mad Are You?: Part 2 | 7.5 | 26 |
| 1 | S46E02 | The Secret You | 7.5 | 50 |
| 1 | S46E12 | To Infinity and Beyond | 7.5 | 80 |
| 1 | S46E15 | Is Everything We Know About the Universe Wrong? | 7.5 | 51 |
| 1 | S48E11 | Out of Control? | 7.5 | 19 |
| 1 | S50E10 | How You Really Make Decisions | 7.5 | 44 |
| 1 | S39E14 | Life on Mars | 7.5 | 0 |
| 1 | S47E16 | Japan Earthquake: A Horizon Special | 7.5 | 11 |
| 1 | S44E04 | Total Isolation | 7.5 | 22 |
| 1 | S44E03 | How to Kill a Human Being | 7.5 | 58 |
| 1 | S39E05 | The Secret of El Dorado | 7.5 | 11 |
| 1 | S48E10 | Solar Storms: The Threat to Planet Earth | 7.5 | 17 |
| 1 | S48E05 | Are You Good or Evil? | 7.5 | 56 |
| 1 | S42E01 | Tsunami: Naming the Dead | 7.5 | 0 |
| 1 | S45E10 | Why Do We Dream? | 7.5 | 51 |
| 1 | S37E07 | Extreme Dinosaurs | 7.4 | 0 |
| 1 | S41E15 | Who's Afraid of Designer Babies? | 7.4 | 0 |
| 1 | S52E19 | Hair Care Secrets | 7.4 | 0 |
| 1 | S29E13 | Resurrecting the Dead Sea Scrolls | 7.4 | 0 |
| 1 | S32E17 | Einstein: The Miracle Year | 7.4 | 0 |
| 1 | S52E14 | My Amazing Twin | 7.4 | 12 |
| 1 | S47E15 | Predators in Your Backyard | 7.4 | 0 |
| 1 | S44E10 | How Much Is Your Dead Body Worth? | 7.4 | 12 |
| 1 | S38E16 | Killer Lakes | 7.4 | 0 |
| 1 | S23E16 | The Race for the Double Helix | 7.4 | 676 |
| 1 | S37E03 | The Lost World of Lake Vostok | 7.4 | 17 |
| 1 | S51E11 | 70 Million Animal Mummies: Egypt's Dark Secret | 7.4 | 19 |
| 1 | S51E12 | Is Binge Drinking Really That Bad? | 7.4 | 29 |
| 1 | S37E08 | Supermassive Black Holes | 7.4 | 85 |
| 1 | S51E16 | OCD: A Monster in My Mind | 7.4 | 18 |
| 1 | S50E13 | Where Is Flight MH370? | 7.4 | 41 |
| 1 | S42E02 | The Hawking Paradox | 7.4 | 66 |
| 1 | S42E21 | Nuclear Nightmares | 7.4 | 27 |
| 1 | S41E06 | Saturn: Lord of the Rings | 7.4 | 14 |
| 1 | S48E04 | The Core | 7.4 | 21 |
| 1 | S49E01 | The Truth About Looking Young | 7.4 | 26 |
| 1 | SUnknoE18 | Space Volcanoes | 7.4 | 21 |
| 1 | S45E02 | How Mad Are You?: Part 1 | 7.4 | 25 |
| 1 | S40E16 | The Truth of Troy | 7.3 | 19 |
| 1 | SUnknoE03 | Cannabis: Miracle Medicine or Dangerous Drug? | 7.3 | 0 |
| 1 | S40E06 | Time Trip | 7.3 | 18 |
| 1 | S47E14 | Are we still Evolving? | 7.3 | 49 |
| 1 | S51E18 | Cosmic Dawn: The Real Moment of Creation | 7.3 | 29 |
| 1 | S53E09 | 10 Things You Need to Know About the Future | 7.3 | 23 |
| 1 | S37E11 | Life on Mars | 7.3 | 0 |
| 1 | S50E08 | Man on Mars: Mission to the Red Planet | 7.3 | 47 |
| 1 | S52E09 | Curing Alzheimer's | 7.3 | 11 |
| 1 | S42E07 | Titan: A Place Like Home? | 7.3 | 23 |
| 1 | S40E08 | The Moscow Theatre Siege | 7.3 | 0 |
| 1 | S49E13 | The Secret Life of the Cat | 7.3 | 92 |
| 1 | S51E04 | Inside the Dark Web | 7.3 | 123 |
| 1 | S22E12 | AIDS: A Strange and Deadly Virus | 7.3 | 0 |
| 1 | S41E13 | Neanderthal | 7.3 | 12 |
| 1 | S41E04 | What Really Killed the Dinosaurs? | 7.2 | 12 |
| 1 | S49E18 | The Truth About Personality | 7.2 | 47 |
| 1 | SUnknoE06 | Coronavirus Special - Part 1 | 7.2 | 13 |
| 1 | S52E03 | The Mystery of Dark Energy | 7.2 | 44 |
| 1 | S53E02 | Why Did I Go Mad? | 7.2 | 13 |
| 1 | S49E14 | Little Cat Diaries | 7.2 | 20 |
| 1 | S54E03 | How to Build a Time Machine | 7.2 | 12 |
| 1 | S37E13 | The Mystery of the Miami Circle | 7.2 | 0 |
| 1 | S52E10 | E-Cigarettes: Miracle or Menace? | 7.2 | 35 |
| 1 | S38E15 | The Mystery of the Jurassic | 7.2 | 12 |
| 1 | S47E10 | Science Under Attack | 7.2 | 38 |
| 1 | S39E12 | Trial and Error | 7.2 | 0 |
| 1 | S41E01 | The Truth About Vitamins | 7.2 | 27 |
| 1 | S48E03 | The Nine Months That Made You | 7.2 | 31 |
| 1 | S38E06 | Helike - The Real Atlantis | 7.1 | 0 |
| 1 | S46E06 | How Long Is a Piece of String? | 7.1 | 39 |
| 1 | S41E14 | An Experiment to Save the World | 7.1 | 0 |
| 1 | S40E01 | The Big Chill | 7.1 | 0 |
| 1 | S43E07 | We Are the Aliens | 7.1 | 19 |
| 1 | S40E10 | Secrets of the Star Disc | 7.1 | 14 |
| 1 | S42E03 | The Mystery of the Human Hobbit | 7.1 | 12 |
| 1 | S38E10 | Death of the Iceman | 7.1 | 0 |
| 1 | S46E13 | What Makes a Genius? | 7.1 | 49 |
| 1 | S54E11 | Avalanche: Making a Deadly Snowstorm | 7.0 | 0 |
| 1 | S40E11 | The Dark Secret of Hendrik Schön | 7.0 | 0 |
| 1 | S51E10 | Dancing in the Dark - The End of Physics | 7.0 | 40 |
| 1 | S32E19 | Fallout from Chernobyl | 7.0 | 0 |
| 1 | S49E02 | Mission to Mars: A Horizon Special | 7.0 | 24 |
| 1 | S53E13 | Mars: a Traveller's Guide | 7.0 | 29 |
| 1 | S39E08 | Averting Armageddon | 7.0 | 0 |
| 1 | SUnknoE00 | The Honest Supermarket: What's Really in Our Food? | 7.0 | 21 |
| 1 | S50E04 | Dinosaurs: The Hunt for Life | 7.0 | 34 |
| 1 | S51E07 | Secrets of the Solar System | 7.0 | 102 |
| 1 | S45E08 | Why Are Thin People Not Fat? | 7.0 | 49 |
| 1 | S50E05 | Comet of the Century: A Horizon Special | 7.0 | 12 |
| 1 | S43E01 | Survivors Guide to Plane Crashes | 7.0 | 17 |
| 1 | S39E15 | The Secret Life of Caves | 7.0 | 0 |
| 1 | S52E17 | The Wildest Weather in the Universe | 7.0 | 21 |
| 1 | S53E08 | Dawn of the Driverless Car | 7.0 | 21 |
| 1 | SUnknoE13 | Pandemic: A Horizon Guide | 7.0 | 0 |
| 1 | S43E08 | My Pet Dinosaur | 6.9 | 12 |
| 1 | S48E12 | The Truth About Fat | 6.9 | 35 |
| 1 | S43E16 | How to Commit the Perfect Murder | 6.9 | 14 |
| 1 | S45E13 | What's the Problem with Nudity? | 6.9 | 31 |
| 1 | S45E06 | Allergy Planet | 6.9 | 16 |
| 1 | S50E07 | Swallowed by a Sink Hole | 6.9 | 16 |
| 1 | S51E15 | First Britons | 6.9 | 11 |
| 1 | S48E15 | Defeating Cancer | 6.9 | 11 |
| 1 | S20E04 | Professor Hawking's Universe | 6.9 | 0 |
| 1 | SUnknoE11 | Coronavirus Special - Part 2 | 6.9 | 0 |
| 1 | S47E08 | What Is One Degree? | 6.9 | 28 |
| 1 | S41E05 | Making Millions the Easy Way | 6.9 | 11 |
| 1 | S43E04 | Human v2.0 | 6.9 | 23 |
| 1 | S52E07 | How to Find Love Online | 6.9 | 28 |
| 1 | S48E06 | Fukushima: Is Nuclear Power Safe? | 6.9 | 19 |
| 1 | S47E05 | Miracle Cure? A Decade of the Human Genome | 6.9 | 11 |
| 1 | S49E15 | Fracking: The New Energy Rush | 6.9 | 19 |
| 1 | S51E03 | Allergies: Modern Life and Me | 6.9 | 24 |
| 1 | S52E11 | Why Are We Getting So Fat? | 6.9 | 41 |
| 1 | S36E01 | Atlantis Uncovered | 6.9 | 0 |
| 1 | S43E03 | The World's First Face Transplant | 6.8 | 0 |
| 1 | S50E03 | Defeating the Hackers | 6.8 | 34 |
| 1 | S51E06 | Is Your Brain Male or Female? | 6.8 | 49 |
| 1 | S50E06 | Sugar v Fat | 6.8 | 108 |
| 1 | S49E11 | The Age of Big Data | 6.8 | 48 |
| 1 | S47E07 | Deepwater Disaster: The Untold Story | 6.8 | 13 |
| 1 | S44E11 | How Does Your Memory Work? | 6.8 | 33 |
| 1 | S49E10 | The Truth About Taste | 6.8 | 27 |
| 1 | S45E04 | Jimmy's GM Food Fight | 6.8 | 16 |
| 1 | S44E07 | How to Make Better Decisions | 6.8 | 29 |
| 1 | S54E12 | Vitamin Pills: Miracle or Myth? | 6.8 | 21 |
| 1 | S53E01 | ADHD and Me with Rory Bremner | 6.8 | 0 |
| 1 | S52E13 | Inside CERN | 6.8 | 24 |
| 1 | S41E17 | The Next Megaquake | 6.7 | 14 |
| 1 | S42E22 | Tutankhamun's Fireball | 6.7 | 15 |
| 1 | S50E11 | Living with Autism | 6.7 | 11 |
| 1 | S46E01 | Do I Drink Too Much? | 6.7 | 20 |
| 1 | S53E03 | Strange Signals from Outer Space | 6.7 | 44 |
| 1 | S53E15 | Being Transgender | 6.7 | 0 |
| 1 | S52E05 | The End of the Solar System | 6.7 | 22 |
| 1 | S51E19 | Are Video Games Really That Bad? | 6.7 | 30 |
| 1 | SUnknoE05 | Addicted to Painkillers? Britain's Opioid Crisis | 6.7 | 0 |
| 1 | S43E05 | The Great Robot Race | 6.6 | 0 |
| 1 | S52E12 | Sports Doping - Winning at Any Cost? | 6.6 | 15 |
| 1 | S45E09 | Cannabis: The Evil Weed? | 6.6 | 92 |
| 1 | S40E14 | T.Rex: Warrior or Wimp? | 6.6 | 17 |
| 1 | S54E10 | Body Clock: What Makes Us Tick? | 6.5 | 16 |
| 1 | S47E12 | Surviving a Car Crash | 6.5 | 11 |
| 1 | S51E09 | Aftershock: The Hunt for Gravitational Waves | 6.5 | 31 |
| 1 | S37E10 | Atlantis Reborn Again | 6.5 | 12 |
| 1 | S51E17 | Which Universe Are We In? | 6.5 | 88 |
| 1 | S39E02 | Stone Age Columbus | 6.5 | 0 |
| 1 | S50E14 | What's Wrong with Our Weather? | 6.5 | 19 |
| 1 | S45E16 | Why Can't We Predict Earthquakes? | 6.4 | 16 |
| 1 | S54E14 | The Contraceptive Pill: How Safe Is It? | 6.4 | 0 |
| 1 | SUnknoE10 | The Great British Intelligence Test | 6.4 | 0 |
| 1 | S35E17 | New Star in Orbit | 6.3 | 0 |
| 1 | SUnknoE01 | Inside the Social Network: Facebook's Difficult Year | 6.3 | 15 |
| 1 | S52E02 | Project Greenglow: The Quest for Gravity Control | 6.3 | 31 |
| 1 | S40E09 | The Atkins Diet | 6.3 | 0 |
| 1 | S53E12 | What Makes a Psychopath? | 6.2 | 72 |
| 1 | S54E07 | A Week Without Lying - The Honesty Experiment | 6.1 | 0 |
| 1 | SUnknoE08 | Toxic Town: The Corby Poisonings | 6.1 | 0 |
| 1 | S54E06 | Stopping Male Suicide | 6.0 | 11 |
| 1 | SUnknoE16 | Jimmy Carr & the Science of Laughter: A Horizon Special | 5.9 | 16 |
| 1 | S36E07 | Life and Death in the 21st Century: Living Forever | 5.9 | 0 |
| 1 | S43E06 | Pandemic | 5.8 | 14 |
| 1 | S36E02 | Atlantis Reborn | 5.6 | 0 |
| 1 | SUnknoE17 | Clean Eating - The Dirty Truth | 5.6 | 44 |
| 1 | S52E18 | Clean Eating: The Dirty Truth | 5.5 | 0 |
| 1 | S38E13 | The Fall of the World Trade Center | 5.4 | 0 |
| 1 | SUnknoE09 | The Restaurant that Burns Off Calories | 5.0 | 0 |
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