Ralph Bellamy

Insp. Steve Trent

Shirley Grey

Betty Lane

Gail Patrick

Helen Stanley

Kane Richmond

Lee Davis

Bradley Page

George T. Noel

Vincent Sherman

Karl Williams

Phillip Trent

Larry King (as Clifford Jones)

Arthur Rankin

Jimmy

Lucien Prival

Gibson

Ward Bond

Jack Baker

Helen Eby-Rock

Jessie Allen

Frank O'Connor

Ballistic Expert

Charles Brinley

Electrician (uncredited)

Stephen Chase

Wallach (uncredited)

Jack Cheatham

Motorcycle Officer (uncredited)

Edmund Cobb

Electrician (uncredited)

Kernan Cripps

Gateman (uncredited)

Budd Fine

Guard #1 (uncredited)

Pat Harmon

Electrician (uncredited)

William Humphrey

Doctor (uncredited)

Edward Keane

Mr. Richardson - Studio Manager (uncredited)

Frank Mills

Property Man (uncredited)

Hal Price

Reilly (uncredited)

Lee Shumway

Radio Announcer (uncredited)

Cap Somers

Electrician (uncredited)