Peter Macintosh Firth (born 27 October 1953) is an English actor. He is best known for his role as Sir Harry Pearce in the BBC One programme Spooks; he is the only actor to have appeared in every episode of the programme's ten-series lifespan. He has given many other television and film performances, most notably as Alan Strang in Equus (1977), earning both a Golden Globe Award and an Academy Award nomination for the role. Early life, family and education Firth was born in Bradford, West Riding of Yorkshire, England, the son of publicans Mavis (née Hudson) and Eric Macintosh Firth. He attended Hanson School in Bradford. Early career Child actor Firth was a leading child actor by the middle of 1969, having starred in the first series of The Flaxton Boys as Archie Weekes and then the following year in the series Here Come the Double Deckers, both of which featured child actors in the leading roles. Firth played Scooper, the leader of the gang. In 1972 he also starred in the ITV (London Weekend Television) series The Adventures of Black Beauty, episode "The Runaway", playing David Abbott. In July 1973, Firth appeared at Laurence Olivier's National Theatre, starring in the stage version of Peter Shaffer's play Equus as a teenager being treated by a psychiatrist, and in October 1974 repeated the role in the Broadway production, receiving a Tony Award nomination for his performance as Alan Strang. Firth starred in an episode of The Protectors, titled “Implicado”, first screened in November 1973. He played Stephen Douglas, an innocent young man, alongside Patrick Mower as a drug-dealer. Next stage of career Firth's first major role as an adult was the title part in a BBC Television Play of the Month adaptation of Oscar Wilde's novel The Picture of Dorian Gray (1976). The script was based on a stage adaptation by John Osborne, and also starred Jeremy Brett and John Gielgud. That same year saw the release of the World War I film Aces High which featured Firth as the inexperienced RFC pilot Lt. Stephen Croft. Firth played the lead role in the film adaptation of Henry Fielding's Joseph Andrews (1977). That same year he starred with Richard Burton in the film adaptation of Equus. The film was only a moderate box-office success, but earned Firth a nomination for the Academy Award for Best Supporting Actor and a Golden Globe