He made his professional stage debut in The Life Machine at the Regent Theatre, King's Cross in 1932 following a period in repertory. Thereafter he appeared in many successful plays, including Half a Crown (1934), Ringmaster (1935), Roulette (1935), The Lady of La Paz (1936) and Madmoiselle (1936)
He starred in the long-running George and Margaret (1937) at the Wyndham's Theatre, which ran for 799 performances.
He followed it with Tony Draws a Horse (1939) and Children to Bless You (1939).
During the late 1940s and 1950s, he became known as a debonair leading man in British films, though he could also portray rogues. He featured in The Sound Barrier (aka, Breaking Through the Sound Barrier, 1952), under the direction of David Lean.
After the war he appeared in Morning Departure (1946) on TV and Fools Rush In, Tomorrow's Child (1946) and Noose (1947) on stage.
Patrick had film roles in Spring in Park Lane (1948), Uneasy Terms (1948) and notably Noose (1948) playing a spiv. Patrick had a good part in Silent Dust (1948) and was promoted to star for The Jack of Diamonds (1949), which he also co-wrote.
He supported Patricia Roc in The Perfect Woman (1949), and had a key role in the film version of Morning Departure (1950) (a different part to the one he had played on TV).
Patrick was one of several names in Trio (1950) based on stories by W. Somerset Maugham and appeared in the Hollywood-financed Pandora and the Flying Dutchman (1951). He was the young Teacher in The Browning Version (1951) with Michael Redgrave, and appeared in a popular comedy Young Wives' Tale (1951). He returned to the world of Maugham with Encore (1951) and was in Who Goes There! (1951) on stage.
Patrick reprised his Who Goes There! (1952) performance on film then played a test pilot in the popular The Sound Barrier (1952). He was then in Meet Me Tonight (1952) and The Pickwick Papers (1952). Due mostly to The Sound Barrier, exhibitors voted Patrick the seventh most popular British film star with the public, in 1952.
Patrick was in Grand National Night (1953) and was the ninth most popular British star. On stage he was in Escapade (1953) and Birthday Honours (1953).
The following year he was in Forbidden Cargo (1954) and was one of several British stars in The Sea Shall Not Have Them (1954). He supported Richard Widmark in A Prize of Gold (1955) for Warwick Films, who announced Patrick might direct In All Dishonesty for them on stage. It did not happen. Instead Patrick starred in a comedy All for Mary (1955). On stage he was in Green Room Rags (1954) and The Remarkable Mr. Pennypacker (1955).
He supported Jeffrey Hunter in Count Five and Die (1957) and appeared in The Egg (1957) on stage. Patrick made another for Warwick but as an actor only, The Man Inside (1958), with Jack Palance.
On stage Patrick directed No Way to Kill (1958) and Not in the Book (1958) and acted in and directed Pleasure of His Company (1959).
He starred in Sapphire (1959), winner of Best British Film at the 1960 BAFTA Film Awards. It was directed by Basil Dearden who then used Patrick in The League of Gentlemen (1960). On stage he acted in and directed Settled Out of Court (1960).
Patrick made another for Warwick as an actor, The Trials of Oscar Wilde (1960), then made Johnny Nobody (1961) for them as Director and actor.
He was in Zero One (1962–65) on TV and starred in The Informers (1963).
Patrick appeared on stage in The Schoolmistress (1964) and Present Laughter (1965) and he directed Past Imperfect (1964) and Present Laughter (1965) and Alan Ayckbourn's Relatively Speaking (1967) at the Duke of York's Theatre. Film appearances included Battle of Britain (1969), The Virgin Soldiers (1969) and The Executioner (1970). He directed Avanti! (1968) on Broadway.
Other stage appearances included Best of Friends (1970), Reunion in Vienna (1971), Habeas Corpus (1974), The Pay Off (1974), Dear Daddy (1976) and Peter Pan (1978). He also worked steadily as a Director.
