Film and television
Rossiter soon established himself as a character actor in films and television, as well as on stage. He stated: "I think I sensed fairly early on that I was not physically or facially built in the way that would ever fit even remotely into heroic or what used to be called juvenile parts. I always played character parts – right from the start." His first film role was in A Kind of Loving (1962). In Billy Liar (1963) he played the title character's boss. His first major television role was as Detective-Inspector Bamber in the long-running police television series Z-Cars. He also had guest roles in series as diverse as The Avengers ("Dressed to Kill", 1963) and Steptoe and Son ("The Lead Man Cometh", 1964; "The Desperate Hours", 1972). Among his early film credits were four films directed by Bryan Forbes, namely King Rat (1965), The Wrong Box (1966), The Whisperers (1967), and Deadfall (1968).
In 1968, he played Mr Sowerberry in the film version of Lionel Bart's musical Oliver! and took one of the few speaking supporting roles in 2001: A Space Odyssey as the Russian scientist Smyslov. He worked with Stanley Kubrick again in Barry Lyndon (1975), in the role of Captain John Quin. He appeared opposite Peter Sellers in The Pink Panther Strikes Again (1976) as Superintendent Quinlan. In 1968, he appeared in Nigel Kneale's television play The Year of the Sex Olympics, an episode of BBC2's Theatre 625, one of his four appearances in the series.
In Rising Damp, on ITV, Rossiter played Rupert Rigsby, the lecherous landlord of a house converted into shabby bedsits, reprising the role from the successful stage version, The Banana Box. While he was in Rising Damp he also took the lead role in The Fall and Rise of Reginald Perrin, adapted by David Nobbs from his own comic novels and broadcast on the BBC. Rossiter was given a surprise tribute on This Is Your Life in 1975. He appeared in "I Tell You It's Burt Reynolds", an episode of the 1977 Yorkshire Television series The Galton & Simpson Playhouse, as well as the short films The Waterloo Bridge Handicap (1978), and Galton and Simpson's Le Pétomane (1979). After his portrayal of Reginald Perrin, Rossiter's non-comedy roles on television became less frequent, although there were exceptions, such as a debt collector in the one-off HTV thriller Machinegunner (1976), and Frank Harris in Fearless Frank, or Tit-bits from the Life of an Adventurer (1978), a BBC Play of the Week.
From 1978 to 1983, Rossiter performed in ten commercials for Cinzano. The series of adverts was created by film director Alan Parker and, at Rossiter's suggestion, used an old music hall joke where he spills a drink over his wife, played by Joan Collins. In the Channel 4 programme The 100 Greatest TV Ads (2000) Terry Lovelock, the director of two of the commercials, said that Rossiter used to refer jokingly to Collins as "The Prop".
Rossiter reprised Rigsby for a film version of Rising Damp in 1980, thus achieving the distinction of playing the same role on stage, television, and film. He continued to make a steady stream of film appearances, including a role in Lindsay Anderson's Britannia Hospital (1982). His last television role was as the supermarket manager in another ITV sitcom, Tripper's Day (1984).
He performed comic monologues in The Green Tie on the Little Yellow Dog, which was recorded 1982, and broadcast by Channel 4 in 1983.
Rossiter also played the title role in the BBC Television Shakespeare production of The Life and Death of King John (1984). His last film appearance was in Water (1985).
