Roy Roberts
as Capt. Breen
Lyle Latell
as Sergeant (uncredited)
Jack Webb
as Lee
Whit Bissell
as Paul Reeves
Richard Basehart
as Roy Martin/Roy Morgan
Scott Brady
as Sgt. Marty Brennan
James Cardwell
as Sgt. Chuck Jones
Robert Bice
as Detective with Capt. Breen (uncredited)
Reed Hadley
as Narrator (uncredited)
John McGuire
as Officer Robert Rawlins (uncredited)