Characters played by William Powell
Dr. Lawrence Bradford
Characters played by Jean Arthur
Paula Bradford
Characters played by James Gleason
Inspector Corrigan
Characters played by Eric Blore
Stokes
Characters played by Robert Armstrong
Nick Martel
Characters played by Lila Lee
Miss Prentiss
Characters played by Grant Mitchell
John Summers
Characters played by Erin O'Brien-Moore
Mrs. Summers
Characters played by Ralph Morgan
Leroy Hutchins
Characters played by Lucile Gleason
Mrs. Hutchins
Characters played by Johnny Arthur
Mr. Frankenstein
Characters played by Stanley Blystone
Police Radio Operator
Characters played by Tom Brower
Police Sergeant
Characters played by Spencer Charters
Dr. Bunting
Characters played by Frankie Darro
Spike Salisbury
Characters played by John Dilson
Analyst Examining Gelatin Capsule
Characters played by James Donlan
Taxi Driver
Characters played by Paul Fix
Lou Pender
Characters played by Dorothy Granger
Fill-in Receptionist
Characters played by Sam Hayes
Race Announcer
Characters played by Rollo Lloyd
Landlord
Characters played by Edward McWade
Minister in Film
Characters played by Frank Reicher
Henry Strand
Characters played by Charles Richman
Mr. Curtis
Characters played by Syd Saylor
Detective
Characters played by John Sheehan
Bert Murphy
Characters played by Buster Slaven
Newsboy
Characters played by Al St. John
Morgue Attendant
Characters played by Henry Stone
Ray Torro
Characters played by Bob Tansill
Joe Jerino
Characters played by Frank M. Thomas
Mike North