A Los Angeles fire captain (Roy Roberts) sends an arson-squad rookie (George Cooper) undercover.
Russ Haines
Capt. S. Taplinger
Sgt. 'Berk' Berkeley
E. V. Wessman
Tony Polacheck
Sam Polacheck
Oscar Hollingsworth
Fire Engineer Robby Rollins
Bertha Polacheck
Kenneth Bender
Battalion Fire Chief
Arthur Latch - Lab Technician
Rodell - Arson Inspector (uncredited)
