"Desperate to prove his father innocent of treason, a secretary arranges a clandestine assignation with his employer's wife in order to get the proof he needs. But the plan goes awry when he becomes implicated in her sudden death."
Hugh Williams
as Alan Herriot
Francis L. Sullivan
as Sir Julian Weyre
Viola Keats
as Lady Avril Weyre
Sophie Stewart
as Judy Weyre
John Laurie
as Robb
Googie Withers
as Effie
Felix Aylmer
as Lord Carnforth
Cecil Parker
as Sir Arthur Harding
Henry Caine
as Inspector Marsh
Eliot Makeham
as Dr. Rudd
Shayle Gardner
as Boxall
Gerard Tyrell
as Martin
J. Elder Wills
Art Direction
John Mallinson
Assistant Director
Walter Ellis
Theatre Play
Leslie Rowson
Director of Photography
Ian Dalrymple
Adaptation
George Burgess
Sound Recordist
Harry Gillam
Camera Operator
Editor
Sidney Stone
Assistant Editor
Geoffrey Rowson
Production Manager
Michael Powell
Director