A convicted female blackmailer is found murdered in her flat and suspicion falls on three men, all of whom the police believe may have had reason to wish her dead
Valerie Hobson
as Alycia Roche
James Robertson Justice
as Jonathan Roche
Edward Underdown
as Hugh Allen
Henry Kendall
as Ronald Parker
Garry Marsh
as Inspector Thornton
Sam Kydd
as Sgt. Baker
Ian Fleming
as Dr. Forrest
Daniel Wherry
as Pierce
Daphne Newton
as Miss Quinn
