Ralph Bellamy

as Insp. Steve Trent

Shirley Grey

as Betty Lane

Gail Patrick

as Helen Stanley

Kane Richmond

as Lee Davis

Bradley Page

as George T. Noel

Vincent Sherman

as Karl Williams

Phillip Trent

as Larry King (as Clifford Jones)

Arthur Rankin

as Jimmy

Lucien Prival

as Gibson

Ward Bond

as Jack Baker

Helen Eby-Rock

as Jessie Allen

Frank O'Connor

as Ballistic Expert

Charles Brinley

as Electrician (uncredited)

A.S. Byron

as Detective #3 (uncredited)

Stephen Chase

as Wallach (uncredited)

Jack Cheatham

as Motorcycle Officer (uncredited)

Edmund Cobb

as Electrician (uncredited)

Kernan Cripps

as Gateman (uncredited)

Budd Fine

as Guard #1 (uncredited)

Pat Harmon

as Electrician (uncredited)

A.R. Haysel

as Detective #2 (uncredited)

William Humphrey

as Doctor (uncredited)

Edward Keane

as Mr. Richardson - Studio Manager (uncredited)

Sam Lufkin

as Motorcycle Officer (uncredited)

Buck Mack

as Electrician (uncredited)

Frank Mills

as Property Man (uncredited)

Bruce Mitchell

as Guard #2 (uncredited)

Earl Pingree

as Detective #1 (uncredited)

Hal Price

as Reilly (uncredited)

Ky Robinson

as Jennings (uncredited)

Dick Rush

as Detective #4 (uncredited)

Lee Shumway

as Radio Announcer (uncredited)

Cap Somers

as Electrician (uncredited)

Ned Winchester

as Double (uncredited)