As a boy, filmmaker James Cameron dreamed of a journey to the deepest part of the ocean. This film is the dramatic fulfillment of that dream. It chronicles Cameron's solo dive to the depths of the Mariana Trench-nearly seven miles beneath the ocean's surface-piloting a submersible he designed himself. The risks were astounding. The footage is breathtaking. DEEPSEA CHALLENGE is a celebration of science, courage, and extraordinary human aspiration.

The film gives an extensive insight into the concept, the recording of the songs and the designing of the album cover. It includes exclusive interviews with almost every key person, who participated in producing the album. The band is represented by all three surviving members – David Gilmour, Nick Mason and Roger Waters. Other participating people include: Joe Boyd, Venetta Fields, Jill Furmanovsky, Roy Harper, Brian Humphries, Peter Jenner, Nick Kent, Aubrey Powell, Ronnie Rondell Jr. (who depicted the 'urning man' on the original cover), Gerald Scarfe, and Storm Thorgerson.

Horizon investigates the idea that the best way to lose weight successfully is a personalised approach, diets tailored to our individual biology and psychology. In a groundbreaking experiment, Dr Chris van Tulleken and Tanya Byron join a team of experts to put 75 overweight volunteers on diets designed to tackle the specific reasons why they eat too much. The volunteers are put through a series of tests at a residential clinic to understand how their genes, hormones and psychology influence their eating behaviour. They are then put on the diets the experts believe are best suited to them. Can science succeed where other diets have failed?