Richard Pearson's early stage career was interrupted by military service in the Second World War with the 52nd (Lowland) Infantry Division.

In later years, Pearson is perhaps best known for his role as Mole in Cosgrove Hall's The Wind in the Willows (1983), its subsequent television series, which led on from the original film, and its spin-off programme Oh, Mr. Toad, in all of which he starred alongside David Jason, Peter Sallis and Michael Hordern.

Though well known as a character actor, his leading roles in London theatres included Stanley in Harold Pinter's The Birthday Party (Lyric, Hammersmith, 1958), Charles Sidley in Peter Shaffer's The Public Eye (Globe, 1962), Harry in Charles Dyer's Staircase (Arts, Cambridge, 1969), and Mr Hardcastle in Oliver Goldsmith's She Stoops to Conquer (Young Vic, 1972).

With The Birthday Party, after a short, successful provincial tour, "the play was critically slaughtered when it opened at the Lyric Hammersmith in London in May 1958.

But Pearson's portrait of the lodger fixed itself longest in the critical memory for its study of unexplained but deeply felt terror.