A victim's boyfriend sneaks into a blackmailer's flat to sort him out, but another man's already there, and both don't realise the crook has been murdered before they got there. The police soon arrive, tipped off in advance.
John Le Mesurier
Warden
Jack Watling
Frank Leamington
Bernard Archard
Trainer
Barry Keegan
Charles Berry
Ann Bell
Susan
Campbell Singer
Hurley Brown