of Doom), Dracula, Beau Geste, Juliet Bravo, Bloomers, Ever Decreasing Circles, Doctor Snuggles, Chance in a Million, The Bill, One Foot in the Grave, Open All Hours, The New Statesman, Don't Wait Up, Soldier Soldier, Brass Eye, My Family, In Sickness and in Health, Benidorm and Heartbeat. During his appearance in a 1997 Channel 4 mockumentary Brass Eye television episode "Decline", he was tricked into believing Clive Anderson had been shot by Noel Edmonds. In 2006 he took a cameo role in BBC's The Impressionists as the stationmaster at the Gare Saint Lazare. In the 2008 episode "Is Jeremy Quite Safe?" of Last of the Summer Wine he guest-starred as a retired jewel thief with fanciful stories of his past exploits in the South of France. In 2012, he narrated the National Geographic Channel series Strippers: Cars for Cash. On BBC radio, he played an interrogator in the play Rules of Asylum by James Follett, broadcast by BBC Radio 4 in 1973. He also played Dibden Purlew in Getting Nowhere Fast from 2001 to 2004. He became an honorary citizen of Serbia, where Only Fools and Horses remains hugely popular. In 2020, Challis made the documentary Boycie in Belgrade, exploring why the show was so beloved in the Balkan country. Theatre Challis performed many stage roles, including with the Royal Shakespeare Company in the 1960s and the National Theatre. His first performance in London's West End was in Portrait of a Queen in 1965 at the Vaudeville Theatre. In 1977 he played a leading role at the Orange Tree Theatre in Richmond, in Sam Walters’ production of Václav Havel’s play The Memorandum. In 1979 he went on tour of the US with Tom Stoppard's play Cahoot’s Macbeth. His work at the National Theatre included productions of On the Razzle (1979) and The Rivals (1983), with Michael Hordern, and Laughter on the 23rd Floor with Frank Finlay. In a 1993 tour with the National he starred along with Barbara Windsor, Kenneth Waller, and Christopher Villiers in a production of Entertaining Mr Sloane by Joe Orton. He appeared with Sue Holderness ('Marlene' in Only Fools and Horses) in Ayckbourn's Relatively Speaking, Time and Time Again and How the Other Half Loves, and the National Theatre's own production of Boycie and Marlene. In 1995, at the height of the success of Only Fools and Horses, as an established Shakespeare actor he returned to