Early life

Castle was born in Croydon, Surrey. He was educated at Brighton College and Trinity College, Dublin, and trained at the Royal Academy of Dramatic Art.

Work

Castle's first appearance was as Westmoreland on stage in Henry V on 5 June 1964, at the Open Air Theatre, Regent's Park. His first Broadway theatre appearance was in February 1970, as Jos in the short-lived musical Georgy.

In 1967 he made his screen debut as the plotting Prince Geoffrey in the big-screen adaptation of The Lion in Winter. The role garnered him much praise and set him on his way as a supporting actor in London and Hollywood. According to Rotten Tomatoes, The Lion in Winter is Castle's "highest-rated" film.

Castle played the role of Octavius Caesar in Charlton Heston's poorly reviewed version of Antony and Cleopatra (1972), a film that received no U.S. release at all.

Castle appeared as Carruthers, the most honourable of a trio of schemers in an episode of Granada Television's series Sherlock Holmes ("The Solitary Cyclist", 1984). His association with Sherlock Holmes continued with his role as Nigel St Clair in the film version of The Crucifer of Blood (1991). He played Inspector Craddock in an adaptation of the Agatha Christie story "A Murder is Announced" (1985), a role he recreated in the Miss Marple mystery "The Mirror Crack'd from Side to Side" (1992). He also played the title role in the 2000 made-for-TV version of Christie's Lord Edgware Dies. In 1990 Castle starred as Superintendent George Thorne in the BBC's radio adaptations of John Penn's novels. Castle appeared in other TV series, including I Claudius, Ben Hall, and Lost Empires.

Among Castle's stage performances was his role as Oswald in the Royal Shakespeare Company's revival of Ibsen's "Ghosts" in 1967, with Dame Peggy Ashcroft as Oswald's mother Mrs Alving.

Personal life

Castle is married to the writer Maggie Wadey. In a biographical essay for Who's Who in the Theatre in 1981 he listed his favourite parts as Luther, Hamlet and O'Riordan.

Selected filmography

Film

• Blowup (1966)
• The Lion in Winter (1968) as Geoffrey
• The Promise (1969)
• Made (1972)
• Man of La Mancha (1972)
• Antony and Cleopatra (1972)
• The Incredible Sarah (1976)
• Eliza Fraser (1976)
• Eagle's Wing (1979)
• King David (1985)
• Never Never Land (1988)
• Dealers (1989)
• RoboCop 3 (1993)
• Merisairas (1996)
• Gods and Generals (2003)

Television

• The Prisoner (1967) as Number Twelve in the episode "The General"
• The Shadow of the Tower (1972) as Thomas Flamank
• Softly, Softly (1973)
• Warship (1975) as Lieutenant-Commander Peter Tremayne, officer commanding the Royal Navy submarine HMS Ovid in the episode "Under the Surface"
• I, Claudius (1976) as Agrippa Postumus
• The New Avengers (1976)
• The Three Hostages (1977) as Dominick Medina
• 1990 (1977)
• The Prime of Miss Jean Brodie (TV series) (1978) as Teddy Lloyd
• Lillie (1978)
• The Professionals
• Strangers
• Pie in the Sky (TV series)
• Reilly, Ace of Spies
• The Crucifer of Blood as Neville St Clair
• Tales of the Unexpected
• Agatha Christie's Poirot Season 8 Episode 2: "Lord Edgware Dies" (2000) as Lord Edgware
• Miss Marple Series 1 Episode 1: "A Murder is Announced" (1985) as Detective Inspector Craddock
• Miss Marple (TV Series) "The Mirror Crack'd from Side to Side" (1992) as Detective Inspector Craddock
• Lost Empires (with Laurence Olivier and Colin Firth)
• Inspector Morse Series 5 Episode 3: "Who Killed Harry Field?" (1991) as Tony Doyle
• Lovejoy' Series 6, Episode 2: Day of Reckoning as Max Hunter
• The Ruth Rendell Mysteries (1997) as Mark in the episode "A Dark Blue Perfume"
• Nova (2000, Public Broadcasting Service) as David Irving
• Casualty
• The Adventures of Sherlock Holmes
• Spooks
• The Princes in The Tower (2005, Channel 4 production) as Dr John Argentine
• Midsomer Murders Series 10 Episode 3: King's Crystal (2007) as Charles King
• The Tractate Middoth (2013, BBC) as John Eldred

[ Source: Wikipedia ]