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)
| Actor | Role |
|---|---|
 Ray MillandAlan Howard | Alan Howard |
 Ellen DrewDiana Lake | Diana Lake |
 Janine DarceyJacqueline Maingot | Jacqueline Maingot |
 David TreeChris Neilan | Chris Neilan |
 Roland CulverCmdr. Bill Rogers | Cmdr. Bill Rogers |
 Guy MiddletonBrian Curtis | Brian Curtis |
| KKenneth MorganKenneth Lake | Kenneth Lake |
 Margaret YardeMarianne | Marianne |
| TToni GableChi-Chi | Chi-Chi |
 Jim GéraldProfessor Maingot | Professor Maingot |
| MMantovaniHimself - Orchestra Leader | Himself - Orchestra Leader |
| SStella RobertsHerself - Vocalist, Mantovani Orchestra | Herself - Vocalist, Mantovani Orchestra |