Selected filmography:
- Film
- Hitler: The Last Ten Days (1973) as Walter Wagner
- Frightmare (1974) as Barry Nichols
- Are You Being Served? (1977) as Don Carlos Bernardo
- Revenge of the Pink Panther (1978) as Hercule Poirot
- History of the World Part I (1981) as Gerard
- Asterix and the Big Fight (1989) as Ardeco/Sergeant Noodles (voice)
- Run for Your Wife (2012) as Clumsy waiter
- Quartet (2012) as Bobby Swanson
- Alice Through the Looking Glass (2016) as Mantel Clock (uncredited)
- TV
- Fawlty Towers (1975-1979) as Manuel
- Rising Damp (1978) as Snell
- Monkey (1978-1980) as Horse (English dub)
- Eyewitness (1994-1997) as Narrator
- Coronation Street (2009) as Ramsay Clegg
- Terry Pratchett's Going Postal (2010) as Tolliver Groat
- Radio
- Father Brown (1984-86) as Father Brown
- The Count of Monte Cristo (1987) as Edmond Dantès
- Tintin (1992-93) as Snowy
- The Further Adventures of Sherlock Holmes (2002-2010) as Dr. Watson.
- Doctor Who: Shada (2003) as Skagra
- The Code of the Woosters (2006) as Jeeves
- Dirk Gently's Holistic Detective Agency (2007) as Professor Chronotis
- Doctor Who: The Boy That Time Forgot (2008) as The Scorpion King/Adric
- Neverwhere (2013) as Tooley
