Dennis O'Keefe as Lieutenant Bill Mason

Judith Anderson as Slade

Frances E. Neal as Ann Rogers

Mildred Coles as Mary Jordan Powell

Eric Blore as Mr. Hartford

Marc Lawrence as Lefty Landers

Damian O'Flynn as Lieutenant Onslow

Andrew Tombes as Art Seidel, Hotel Detective

Marion Martin as Ruby / Mary Jordan

Rand Brooks as James 'Jimmy' Powell

Arthur Shields as Matt Willis

Lee Bonnell as George Atkins

Harry Burns as Big 'Sem' Semenoff

Horace McMahon as Mullen

Huntley Gordon as James A. Pierce

Charles Halton as Mr. Pinchback

Ruth Dietrich as Pinchback's Secretary

Bert Howard as Mr. Tuckerman

Claire McDowell as Mrs. Tuckerman

Stanley Andrews as Police Captain L. Andrews

Robert Middlemass as Police Captain Lovell

Frank O'Connor as Detective Frank

Kernan Cripps as Joe, Police Clerk

Douglas Spencer as Police Secretary

Dale Armstrong as Police Radio Announcer

Joey Ray as Mr. Barlowe

Eddie Conrad as Room Service Waiter

Ross Forrester as Messenger with Package

George Noisom as Bellhop #1

Paul Le Pere as Bellhop #2

Harry Humphrey as Tied-Up Watchman