Memorable moments from festive editions of the classic sitcom, as well as an interview with star David Jason, who shares his secrets from the Christmas sets. There was the episode that ran into overtime and cost the BBC a lot of money because David kept corpsing, and the Christmas special that contained the most expensive joke in the BBC's history. Featuring classic clips, plus interviews with other members of cast and crew, including Tessa Peake-Jones, and celebrity fans such as Theo Paphitis, Sherrie Hewson and Krishnan Guru Murthy