"New York schoolmarm Hildegarde Withers assists a detective when a body of unscrupulous stockbroker Gerald Parker suddenly appears in the penguin tank at the aquarium."
Edna May Oliver
as Hildegarde Withers
James Gleason
as Police Insp. Oscar Piper
Robert Armstrong
as Barry Costello
Mae Clarke
as Gwen Parker
Donald Cook
as Philip Seymour
Edgar Kennedy
as Officer Donovan
Clarence Wilson
as Bertrand B. Hemingway
James Donlan
as Security Guard Fink
Gustav von Seyffertitz
as Von Donnen
William Le Maire
as MacDonald
Joe Hermano
as Chicago Lew
Guy Usher
as Parker
Rochelle Hudson
as Telephone Operator
Wilfrid North
as Judge
A.S. Byron
as Jailer Strauss (uncredited)
Edith Fellows
as Little Girl at Aquarium (uncredited)
Chuck Hamilton
as Jack, Policeman (uncredited)
Mary Mason
as Parker's Secretary (uncredited)
Sidney Miller
as Isadore Marks (uncredited)
Dorothy Vernon
as Purse Snatching Victim at Aquarium (uncredited)
George Archainbaud
Director
Stuart Palmer
Novel
Lowell Brentano
Story
Willis Goldbeck
Screenplay
Kenneth Macgowan
Associate Producer
David O. Selznick
Executive Producer
Henry W. Gerrard
Director of Photography
Jack Kitchin
Editor
Fred Schuessler
Casting
Ray Lissner
Assistant Director
Robert Margolis
Hugh McDowell Jr.
Sound Recordist
Harry Redmond Sr.
Special Effects Supervisor
Stunts
Willard Barth
Assistant Camera
Russell Metty
Camera Operator
Dick Stockton
Casting Assistant
Max Steiner
Music Director
Fred Hendrickson
Still Photographer