Ealing Studios
He first began working as a director at Ealing Studios, co-directing comedy films with Will Hay, starting with Black Sheep of Whitehall (1942). This was followed by The Goose Steps Out (1942) and My Learned Friend (1943), which was Hay's last movie.
Dearden's first solo director credit was The Bells Go Down (1943), a wartime movie with Tommy Trinder. It was produced by Michael Relph who would form a notable collaboration with Dearden.
Dearden also directed The Halfway House (1944), a drama set in Wales, and wrote and directed They Came to a City (1944), based on a play by J.B Priestley.
Dearden worked on the influential chiller compendium Dead of Night (1945) and directed the linking narrative and the "Hearse Driver" segment.
He also directed The Captive Heart (1946) starring Michael Redgrave, which was a big hit. The film was entered into the 1946 Cannes Film Festival. He directed Frieda (1947) with Mai Zetterling and produced by Relph, which was also popular.
Dearden directed Saraband for Dead Lovers (1948) an expensive costume picture that was not a large success. He wrote and directed a segment of Train of Events (1949).
The Blue Lamp (1950), probably the most frequently shown of Dearden's Ealing films, is a police drama which first introduced audiences to PC George Dixon, later resurrected for the long-running Dixon of Dock Green television series. It was hugely popular.
Less so were Cage of Gold (1950), a drama with Jean Simmons; Pool of London (1951), a crime film with a black lead, very rare for the time; and I Believe in You (1952), a drama which he also wrote and produced.
Dearden made The Gentle Gunman (1952), an IRA thriller with Dirk Bogarde; The Square Ring (1953), a boxing film with Jack Warner; The Rainbow Jacket (1954), a horse racing drama; and Out of the Clouds (1955), set at an airport.
He did a war film which he also wrote, The Ship That Died of Shame (1955) then a comedy with Benny Hill, Who Done It? (1956).
Dearden did some uncredited directing on The Green Man (1956) then made an Ealing style comedy for British Lion The Smallest Show on Earth (1957).
For Rank he made Violent Playground (1958) with Stanley Baker. He did some uncredited directing on one of Ealing's last films, Nowhere to Go (1958). He also produced Davy (1958), with Harry Secombe, for Ealing.