William Powell
Dr. Lawrence 'Brad' Bradford
Jean Arthur
Paula Bradford
James Gleason
Inspector Corrigan
Eric Blore
Stokes, Bradford's Butler
Robert Armstrong
Nick Martel, Bookie
Lila Lee
Miss Prentiss, Bradford's Receptionist
Grant Mitchell
John Summers, Luxury's Owner
Erin O'Brien-Moore
Mrs. Summers
Ralph Morgan
Leroy Hutchins, War Cloud's Owner
Lucile Gleason
Mrs. Hutchins
Johnny Arthur
Mr. Frankenstein (uncredited)
Stanley Blystone
Police Radio Operator (uncredited)
Tom Brower
Police Sergeant (uncredited)
Spencer Charters
Dr. Bunting (uncredited)
Frankie Darro
Spike Salisbury (uncredited)
John Dilson
Analyst Examining Gelatin Capsule (uncredited)
James Donlan
Taxi Driver (uncredited)
Paul Fix
Lou Pender (uncredited)
Dorothy Granger
Fill-in Receptionist (uncredited)
Sam Hayes
Race Announcer (uncredited)
Rollo Lloyd
Landlord (uncredited)
Edward McWade
Minister in Film (uncredited)
Frank Reicher
Henry Strand (uncredited)
Charles Richman
Mr. Curtis (uncredited)
Syd Saylor
Detective (uncredited)
John Sheehan
Bert Murphy (uncredited)
Buster Slaven
Newsboy (uncredited)
Al St. John
Morgue Attendant (uncredited)
Henry Stone
Ray Torro (uncredited)
Bob Tansill
Joe Jerino (uncredited)
Frank M. Thomas
Mike North (uncredited)
Perry Ferguson
Assistant Art Director
Darrell Silvera
Set Dresser
Anthony Veiller
Screenplay
Wallace Fox
Second Unit Director
Louis Shapiro
Second Assistant Director
John Sherwood
Second Assistant Director
Clem Portman
Sound
Harry Redmond Jr.
Special Effects
Jack MacKenzie
Second Unit Director of Photography
Max Steiner
Original Music Composer
Roy Webb
Original Music Composer
Amalia Kent
Script
Ruthalice Selznick
Script
Stephen Roberts
Director
James Edward Grant
Story
Edward Kaufman
Associate Producer
J. Roy Hunt
Director of Photography
Van Nest Polglase
Art Direction
Bernard Newman
Costume Design
Clem Beauchamp
Assistant Director
John L. Cass
Sound Recordist
Arthur Roberts
Editor
Roy Webb
Music Director