Jimmy Hanley
— Fred
Lana Morris
— Myra
Sonia Holm
— Jean
Jack Allen
— Parker
Sam Kydd
— Spencer
Pat McGrath
— Henry
Michael Mellinger
— Tim
Charles Morgan
— MacLaren
Bruce Beeby
— Inspector Rawlings
Rupert Evans
— Williams
Elizabeth Seal
— Gwen
Jack Stewart
— Gregson
Frank Thornton
— Inspector Finch
Trevor Reid
— Commissioner
Edwin Richfield
— Nat
Jane Harwood
— Cashier
Madge Brindley
— Mrs. Evans
Joan Carol
— Scientific Officer
Tom Bowman
— Detective Sergeant (uncredited)
Jim Brady
— Policeman at Bank (uncredited)
Chick Fowles
— Detective at Briefing (uncredited)
Nora Gordon
— Fred's Landlady (uncredited)
Vernon Greeves
— Radio Detector Operator (uncredited)
Pat Hagan
— Police Constable at Warehouse (uncredited)
Patrick Halpin
— Detective at Briefing (uncredited)
Hubert Hill
— Plotter in Taxi Control Room (uncredited)
George Margo
— American Serviceman in the Taxi (uncredited)
Arthur Mullard
— Detective at Briefing (uncredited)
Fred Nicholas
— Detective at Briefing (uncredited)
Joe Phelps
— Police Constable (uncredited)