Police Officer Dennis Nordell

Tom Trout

Police Inspector Dana

Richard Gaines

Police Lt. O'Neill (uncredited)

Ray Teal

Chief of Police (uncredited)

Charles C. Wilson

Ex-Con Thug (uncredited)

Harry Wilson

Frankie

Anthony Caruso

Police Academy Graduate (uncredited)

Hugh Beaumont

Snorky (uncredited)

William Challee

Police Instructor (uncredited)

Roger Moore

Veteran Policeman McGuinnes (uncredited)

Robert Emmett O'Connor

Calvin 'Whitey' Foster (uncredited)

Arthur Space

Police Captain R.C. Johnson (uncredited)

Harry Strang

Police Lab Technician Wilson (uncredited)

William Tannen

Producer

Chester M. Franklin

Director

Joseph Losey

Screenplay

Charles F. Royal

Art Direction

Richard Duce

Orchestrator

Albert Glasser

Music

Max Terr

Director of Photography

Jackson Rose

Original Story

Richard H. Landau

Editor

Harry Komer