Characters played by Ralph Bellamy
Inspector Steve Trent
Characters played by Shirley Grey
Betty Lane
Characters played by Gail Patrick
Helen Stanley
Characters played by Kane Richmond
Lee Davis
Characters played by Bradley Page
George T. Noel
Characters played by Vincent Sherman
Karl Williams
Characters played by Phillip Trent
Larry King
Characters played by Arthur Rankin
Jimmy
Characters played by Lucien Prival
Gibson
Characters played by Ward Bond
Jack Baker
Characters played by Helen Eby-Rock
Jessie Allen
Characters played by Charles Brinley
Electrician
Characters played by A.S. 'Pop' Byron
Detective #3
Characters played by Stephen Chase
Wallach
Characters played by Jack Cheatham
Motorcycle Officer
Characters played by Edmund Cobb
Electrician
Characters played by Kernan Cripps
Gateman
Characters played by Budd Fine
Guard #1
Characters played by Pat Harmon
Electrician
Characters played by A.R. Haysel
Detective #2
Characters played by William Humphrey
Doctor
Characters played by Edward Keane
Mr. Richardson - Studio Manager
Characters played by Sam Lufkin
Motorcycle Officer
Characters played by Buck Mack
Electrician
Characters played by Frank Mills
Property Man
Characters played by Bruce Mitchell
Guard #2
Characters played by Frank O'Connor
Ballistics Expert
Characters played by Earl Pingree
Detective #1
Characters played by Hal Price
Reilly
Characters played by Ky Robinson
Jennings
Characters played by Dick Rush
Detective #4
Characters played by Lee Shumway
Radio Announcer
Characters played by Cap Somers
Electrician
Characters played by Ned Winchester
Double