Lucy Worsley tells the story of the royal photograph, showing how the royal family worked with generations of photographers to create images that reinvented the British monarchy.

The Secret Life of Dogs explores how man's best friend experiences the world. Tap into dogs' inner psyche in order to determine the true meaning behind various behaviors and body language. Delve deep into canine biology as it is studied through slow-motion footage, thermal images and macro photography, providing new insights into how dogs drink, shake off water, and whether your best friend is left or right pawed.

BBC Four’s new documentary takes us on a journey through more than a century of animation. It examines the creative and technical inventiveness of some of the great animation pioneers who have worked in Britain – trailblazing talents such as Len Lye, John Halas and Joy Batchelor, Joanna Quinn, and Bristol’s world-conquering Aardman Animations.

Lifting the lid on the world of cinema censorship, this programme has unique access to the files of the British Board of Film Classification. Featuring explicit and detailed exchanges between the censor and film-makers, 'Dear Censor' casts a wry eye over some of the most infamous cases in the history of the board. From the now seemingly innocuous Rebel Without a Cause, the first 'naturist' films and the infamous works of Ken Russell, and up to Rambo III, this frank and surprisingly warm documentary demonstrates how a body created by the industry to safeguard standards and reflect shifts in public opinion has also worked unexpectedly closely with the film-makers themselves to ensure that their work was able reach an audience.

As the ice shrinks in the Arctic, polar bears are struggling to survive in a fast melting world. Although classified a marine mammal, the polar bear is not adapted to hunting in the water. And it is certainly no match for the world's greatest aquatic hunter -- the killer whale. In the last few years, scientists have noted an ever-growing number of killer whales in Arctic waters in the summer months. More and more have been attracted to these hunting grounds by the growing expanse of open water. They attack the same prey as the polar bears: seals, narwhal, belugas and bowhead whales.