TV series
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Availability
Checked Jul 22, 2026
Horizon premiered February 4, 1964. We don't have a confirmed streaming, rental or purchase option yet.
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Choose an episode, then use the watch options above for the show.
Episode 1
Dr Michael Mosley immerses himself on the frontline of our prescription painkiller habit. In America, it is an epidemic. Now, new evidence raises concern about the UK's use of prescription opioids.
Where to watch Horizon
Episode 2
Naturalist Chris Packham investigates the impact a growing human population is having on the planet, asking whether the earth can sustain predictions of ten billion people by 2050.
Directed by Charlie RussellGuest stars Chris Packham, David Attenborough
Episode 3
The unknown story of the worst child-poisoning case since thalidomide, featuring a landmark legal battle by a group of mothers determined to uncover the truth.
Where to watch Horizon
Episode 4
Fred Sirieix and Zoe Williams open a restaurant with a difference, where every calorie eaten must be burned off by a secret gym team.
Where to watch Horizon
Episode 5
To celebrate the 30th anniversary of its launch, this film tells the remarkable story of how Hubble revealed the awe and wonder of our universe and how a team of daring astronauts risked their lives to keep it working.
Where to watch Horizon
Episode 6
Dr Hannah Fry and Michael Mosley put the public to the test, pitting young and old, males and females and tech lovers and readers against each other in a battle of wits.
Where to watch Horizon
Episode 7
Comedian Tony Slattery meets experts to explore his psychological problems, finding out if he is definitely bipolar, confronting addiction and opening up about a childhood trauma.
Where to watch Horizon
Episode 8
The incredible story of how Pluto has been propelled from an unremarkable ball of ice on the edge of the solar system to a world of unimaginable complexity - where some form of alien life might exist.
Where to watch HorizonEpisode information updated Jul 24, 2026
Available now in United States
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