Sir David considers two curious creatures - the elephant and the mole rat.
Naomi Wilkinson's hunt for nature's nightmares takes her down under to swim with an enormous saltwater crocodile and search for the highly toxic stonefish. Show more
James plays midwife to a pregnant pig, Cheryl operates on a feline with a broken leg, and Cat uncovers a case of mistaken identity. Show more
A look back at some of the amazing dens from series 1 and 2. Lauren revisits the train, magical library, community and plane dens. Show more
Dick and Dom sample all the fun of the fair in this thrill ride through the engineering genius of roller coasters and water slides. Show more
Andy Torbet attempts to match the Japanese spider crab, so he searches for technology capable of withstanding the pressure of living underwater. Show more
Dara O Briain and Angela Scanlon present, with battles commentated by Jonathan Pearce. Robots include Apex, Vulture, Terrorhurtz, Track-Tion, Bucky the Robot and Rapid. Show more
Semi-final action continues in Sheffield as the penultimate session is played in the bottom half of the draw. Live coverage is introduced by Hazel Irvine.
Four food producers with fledgling businesses come to test out their products on the locals in Malhamdale. In the penultimate heat, producers of drinks compete. Show more
Sara Cox joins eight rural romantics as they begin the journey to find love. Yorkshireman Pete shows his softer side and 32-year-old famer Christine battles with her emotions. Show more
Live semi-final action continues at the Crucible Theatre in Sheffield.
Paul Murton visits some of the most beautiful and remote spots in Britain. In this programme he experiences puffin therapy on the Treshnish Islands.
A collection of interesting and previously unseen finds from places such as Margam Country Park, Highcliffe Castle, Sandon Hall and Powderham Castle. Show more
Classic wartime sitcom. Captain Mainwaring declares martial law when a bomb drops on the outskirts of Walmington-on-Sea.
The second semi-final reaches its climax and by booking his place in the final, the winner pockets at least £180,000 in prize money. Hazel Irvine introduces live action. Show more
Drama based on a true story. Afghanistan, Kajaki Dam. A company of British soldiers encounter a dried-out river bed and under every step, the possibility of an anti-personnel mine. Show more
Michael Palin tells the story behind his success. Including interviews from John Cleese, David Jason, Connie Booth, Armando Iannucci and Clem Vallance. Show more
Swedish thriller sequel. A once-promising student, imprisoned for drugs smuggling, is released and comes back into contact with his former gang. Show more
