A doctor is driven into an investigation of sinister goings-on at a horse race track by his mystery writer ex-wife.
William Powell
as Dr. Lawrence 'Brad' Bradford
Jean Arthur
as Paula Bradford
James Gleason
as Inspector Corrigan
Eric Blore
as Stokes, Bradford's Butler
Robert Armstrong
as Nick Martel, Bookie
Lila Lee
as Miss Prentiss, Bradford's Receptionist
Grant Mitchell
as John Summers, Luxury's Owner
Erin O'Brien-Moore
as Mrs. Summers
Ralph Morgan
as Leroy Hutchins, War Cloud's Owner
Lucile Gleason
as Mrs. Hutchins
Johnny Arthur
as Mr. Frankenstein (uncredited)
Stanley Blystone
as Police Radio Operator (uncredited)