American actors Edmund Lowe and Constance Cummings star in this humorous thriller, which blends classic elements of farce, sparkling dialogue and Hitchcockian suspense. Seven Sinners was the first film to feature a joint writing credit for Frank Launder and Sidney Gilliat, the prolific and hugely talented partnership best known for Hitchcock's The Lady Vanishes - which was itself in many ways prefigured by Seven Sinners - and the classic St. Trinian's series.