Errol Flynn as Francis Monroe Warren II, alias F.X. Pettijohn

Brenda Marshall as Rita Warren

Ralph Bellamy as Dr. R.L. Davis

Alan Hale as Police Insp. Charles M. Mason

Lee Patrick as Blondie White

Allen Jenkins as Wilfred

Lucile Watson as Agatha Archer

William Frawley as Det. 'Hoppy' Hopkins

Roscoe Karns as Monahan

Grant Mitchell as Wellington Carruthers

Maris Wrixon as June Brewster

Noel Madison as Leopold Fissue

Jack La Rue as Ace Vernon

Turhan Bey as Ahmed

Wade Boteler as Police Sergeant (uncredited)

Richard Cramer as Detective Bringing Vernon (uncredited)

Frank Faylen as Gus a Taxi Driver (uncredited)

Creighton Hale as Mr. Harlan (uncredited)

William Hopper as Police Secretary (uncredited)

Olaf Hytten as Horace the Butler (uncredited)

Frank Mayo as Joe a Cop (uncredited)

Jack Mower as Police Sgt. Brent (uncredited)

David Newell as June's Escort (uncredited)