A former member of Joan Littlewood's Theatre Workshop, Foster began to appear regularly on television in the 1960s, often being cast as policemen or villains. His numerous credits include The Avengers, Danger Man, The Saint, Randall and Hopkirk (Deceased), Steptoe and Son, The Persuaders! and Public Eye. However, Foster is best known for playing Detective Inspector Dunn on Z-Cars.
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