Horizon Season 44 Episodes

Episode 1

My Pet Dinosaur

Episode 2

The Elephant's Guide to Sex

Episode 3

Prof. Regan's Beauty Parlour

Professor Lesley Regan, one of the UK's most well-respected (and glamorous) medical experts, turns her scientific eye on the world of cosmetics. She's just turned 50, and is out to create an experimentally proven beauty cabinet. Unafraid to examine the wrinkles, age spots and broken veins on her own face, Professor Regan explores just what makes us look old, and if we can slow down the ageing process. The extraordinary world of cosmetic testing is revealed, from the British hair lab which makes New York tap water, to the volunteers sun-bathing for science. Sun damage, cellulite and balding all face Professor Regan's scrutiny as she discovers which cosmetics do - and don't - have the scientific evidence to back up their claims.

Episode 4

Mad But Glad

Episode 5

Moon for Sale

Episode 6

Battle of the Brains

Episode 7

Skyscraper Fire Fighters

Episode 8

The Six Billion Dollar Experiment

Episode 9

How to Commit the Perfect Murder

With the help of forensic scientists and real-life murder investigations, Horizon explores whether it is possible to commit a perfect murder.

Episode 10

Everest: Doctors in the Death Zone - Part 1

Episode 11

Everest: Doctors in the Death Zone - Part 2