
Born Patrick Carl Cheeseman in Cleethorpes, Lincolnshire, England. He was brought up in neighbouring Grimsby and frequently re-visited the area during the height of his career. He attended University College, London, before training at the Old Vic Theatre School and making his first stage appearance in a walk-on part in Othello in 1951. He toured South Africa the following year and then directed plays for the drama department at Stanford University, California. Moving to the Shakespeare Memorial Theatre, Stratford-upon-Avon, Wymark played a wide range of traditional roles, including Dogberry in Much Ado about Nothing and Stephano in The Tempest. He also played the parts of Marullus in Julius Caesar and Bottom in A Midsummer Night's Dream. Other stage parts included the title role in Danton's Death and, with the Royal Shakespeare Company, Ephihodov in The Cherry Orchard. His theatre roles also included playing the part of Bosola in a Royal Shakespeare Company production of John Webster's The Duchess of Malfi in 1960. His film roles included: Children of the Damned (1964), Operation Crossbow (1965), Battle of Britain (1969), Where Eagles Dare (1968), Blood on Satan's Claw (1971) and Cromwell (1970). On television, where at one point he was considered as a replacement for William Hartnell on Doctor Who., he was best known for his role as the machiavellian businessman John Wilder in the drama series The Plane Makers/The Power Game, a role which led to offers of company directorships. Wymark, however, was a gentle man in real life, self-confessedly ignorant of business matters, who considered the Wilder character to be a "bastard" and was described by his wife as "the most inefficient, dreamy muddler in the world."

Where Eagles Dare
1968 · as Col. Wyatt Turner DSO MC

Repulsion
1965 · as le propriétaire

Battle of Britain
1969 · as Air Vice Marshal Trafford Leigh-Mallory

Woman Times Seven
1967 · as Henri

Operation Crossbow
1965 · as Prime Minister Winston Churchill

Witchfinder General
1968 · as Cromwell

The Blood on Satan's Claw
1971 · as The Judge

Cromwell
1970 · as The Earl of Strafford

The Psychopath
1966 · as Inspector Holloway

Children of the Damned
1964 · as Commander

The Criminal
1960 · as Sol

Doppelgänger
1969 · as Jason Webb

As You Like It
1963 · as Touchstone

The Skull
1965 · as Anthony Marco

The League of Gentlemen
1960 · as Wylie

Brand
1959 · as Mayor

The Invasion
1963 · as Royston Land-Price

Dr. Syn, Alias the Scarecrow
1963 · as Joseph Ransley