It is based on the popular West End stage comedy by Terrence Rattigan. It all begins when Diana (Ellen Drew), the sister of a British boy studying in France, arrives in town to flirt with all of her brothers' schoolmates. Alan (Ray Milland), one of the students, successfully resists Diana's charms-meaning of course that Alan and Diana will be in each other's arms by fadeout time. (AllMovie)
as Alan Howard
as Diana Lake
as Jacqueline Maingot
as Chris Neilan
as Cmdr. Bill Rogers
as Brian Curtis
as Kenneth Lake
as Marianne
as Chi-Chi
as Professor Maingot
as Himself - Orchestra Leader
as Herself - Vocalist, Mantovani Orchestra