Inspector Gregory
Howard Rogers
Ann Rogers
Det. Sgt Conway
Mr. Fisher
Bank Manager
Barman
Fred (as Frank Pettit)
Policewoman Scott
Station Booking Clerk
Landlady
River Police Sergeant
River Police Constable
Uniformed Constable
Doctor (as Reggie Hearne)
Forensic Chemist
Norman Cole
Plain Clothes Detective
Photographer
Uniformed Policewoman
PC Barrow (uncredited)