Lenny Henry , Griff Rhys-Jones and Jonathan Ross set rolling six hours of red-hot comedy. Bob Hoskins , Russ Abbot , Richard Briers , Jean Boht, Phillip Schofield and Bill Wyman squeeze into the sketch show Star Crazy!, Tony Robinson presents Cartoon Hits and Griff reports on the need for clean water among the Masai in Kenya.8.00pm Hero Turtles, Stupid Videos and Lovely JulianA message from the Hero Turtles, a compilation of funny home videos from Chris Tarrant , and Julian Clary hosts a celebrity phone line. Plus an unusual look at Comic Relief's work in the UK, and the start of A-Z of Comedy, with A for Aristocratic Twits and B for Basil Fawlty.8.30pm Four Birds of a Feather and One RonnieA unique edition of Birds of Feather in which Sharon and Tracy meet two birds who look suspiciously like French and Saunders. Ronnie Corbett is live in the studio, and Melvyn Bragg traces the extraordinary career of Postman Pat.