Q Planes (known as Clouds Over Europe in the United States) is a 1939 British comedy spy film starring Ralph Richardson, Laurence Olivier and Valerie Hobson. Olivier and Richardson were a decade into their fifty-year friendship and were in the process of staging a theatrical version of Othello, with Richardson in the title role and Olivier as Iago, when this film was made.

Q Planes was produced by Irving Asher, an American, with British film impresario Alexander Korda as executive producer. The film was directed by an American, Tim Whelan (Sidewalks of London, and later in 1940, co-director of The Thief of Bagdad), who had lived in Britain since 1932, working for Korda at Denham Studios.