Roy Martin aka Roy Morgan is a burglar and former war-time Radio & Electronics Engineer who listens in to radio police calls, allowing him to stay one step ahead of the cops.

Richard Basehartas Roy Martin / Roy Morgan
Scott Bradyas Police Sgt. Marty Brennan
Roy Robertsas Police Captain Breen
Whit Bissellas Paul Reeves
James Cardwellas Police Sgt. Chuck Jones
Jack Webbas Lee Whitey
Reed Hadleyas Narrator (voice) (uncredited)
Frank Cadyas Pete Hammond
Dorothy Adamsas Milk Customer
Jane Adamsas Nurse Scanion (uncredited)
John Alton