William Powell

Character: Dr. Lawrence 'Brad' Bradford

Jean Arthur

Character: Paula Bradford

James Gleason

Character: Inspector Corrigan

Eric Blore

Character: Stokes, Bradford's Butler

Robert Armstrong

Character: Nick Martel, Bookie

Lila Lee

Character: Miss Prentiss, Bradford's Receptionist

Grant Mitchell

Character: John Summers, Luxury's Owner

Erin O'Brien-Moore

Character: Mrs. Summers

Ralph Morgan

Character: Leroy Hutchins, War Cloud's Owner

Lucile Gleason

Character: Mrs. Hutchins

Johnny Arthur

Character: Mr. Frankenstein (uncredited)

Stanley Blystone

Character: Police Radio Operator (uncredited)

Tom Brower

Character: Police Sergeant (uncredited)

Spencer Charters

Character: Dr. Bunting (uncredited)

Frankie Darro

Character: Spike Salisbury (uncredited)

John Dilson

Character: Analyst Examining Gelatin Capsule (uncredited)

James Donlan

Character: Taxi Driver (uncredited)

Paul Fix

Character: Lou Pender (uncredited)

Dorothy Granger

Character: Fill-in Receptionist (uncredited)

Sam Hayes

Character: Race Announcer (uncredited)

Rollo Lloyd

Character: Landlord (uncredited)

Edward McWade

Character: Minister in Film (uncredited)

Frank Reicher

Character: Henry Strand (uncredited)

Charles Richman

Character: Mr. Curtis (uncredited)

Syd Saylor

Character: Detective (uncredited)

John Sheehan

Character: Bert Murphy (uncredited)

Buster Slaven

Character: Newsboy (uncredited)

Al St. John

Character: Morgue Attendant (uncredited)

Henry Stone

Character: Ray Torro (uncredited)

Bob Tansill

Character: Joe Jerino (uncredited)

Frank M. Thomas

Character: Mike North (uncredited)