A special celebrating the funniest sitcoms of the 1970s, with a host of celebrity guests. Cameras reveal how Michael Crawford performed all his own slapstick stunts in Some Mothers Do 'Ave 'Em, and how the cast of The Good Life bonded over pea pod burgundy. There's also a look at how Fawlty Towers became a huge hit, and how a real-life affair inspired Carla Lane to write suburban sitcom Butterflies. Featuring stand-out moments from The Last of The Summer Wine, The Liver Birds, The Rise and Fall of Reginald Perrin, Steptoe and Son, and Dad's Army.