Comic Relief - 2009 - Part 1: David Tennant and Davina McCall/Harry Hill/the Saturdays/Ronnie Corbett/Let's Dance for Comic Relief

The funniest night of the year starts with David Tennant and Davina McCall, a Harry Hill TV Burp special, the Saturdays performing their Comic Relief single, and an alien Ronnie Corbett landing himself in a Sarah Jane Adventure. David and Davina go head-to-head in a special edition of Mastermind, the kids in Outnumbered outsmart the adults doing something funny for money, and there are high-kicking highlights of celebs recreating famous routines in Let's Dance for Comic Relief.