Comedian, actor and children's author, David Walliams talks about his new sitcom 'Big School' and 'That Puppet Game Show' host Dougie Colon, on his brand new Saturday night series. We meet charity swimmer Sean Conway as he takes on the Land's End to John O'Groats challenge...but is the first ever to attempt it by sea. Mike Dilger visits the only self-sustaining Wallaby community in the Northern Hemisphere on the Isle of Man and Larry Lamb travels to Berlin to investigate the story of Henry Hadley - a man who may have been the first casualty of WWI.