Sonia Dresdel
— Steffy Millington
Guy Middleton
— Inspector Mallory
Hubert Gregg
— Jack Kurton
Colin Gordon
— Bill Millington
Karl Stepanek
— Richard Carling
Eleanor Summerfield
— Vera Kurton
John Slater
— James C. Oliver
Michael Martin Harvey
— Hewson (as Michael Martin-Harvey)
Cyril Smith
— Detective Horton