Dennis O'Keefe
— Paul Mitchell
Coleen Gray
— Mary Mason
Hugh Williams
— Sir Richard Aldingham
Guy Middleton
— Smith
John Laurie
— Henry Mason
Gerald Case
— Randall
Seymour Green
— Weston
Eliot Makeham
— George
Stanley Van Beers
— Cartwright
Ellen Pollock
— Miss Fossett
Morris Sweden
— Pettigrew
Dora Bryan
— Barmaid
Arnold Bell
— Police Inspector
Michael Ward
— Art Salesman
Clifford Buckton
— Lodging House Keeper
Leslie Phillips
— Boy Student
Marianne Noelle
— Girl Student
Billie Whitelaw
— Waitress
John Wadham
— Thug
Beatrice Kane
Frank Atkinson
— uncredited
Tom Clegg
— uncredited
Guy Deghy
— uncredited
Harold Sanderson
— uncredited
Johnnie Schofield
— uncredited
Leonard Sharp
— uncredited
Philip Ray
— Bearded Tramp
Hyma Beckley
— Art Gallery Visitor (uncredited)
Jimmy Cains
— Howard - Tate Gallery Attendant (uncredited)
Dan Darnelli
— Pub Customer (uncredited)