Edna May Oliver as Miss Hildegarde Martha Withers

Robert Armstrong as Barry Costello

James Gleason as Police Inspector Oscar Piper

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 / Dr. Max Bloom

William Le Maire as MacDonald

Joe Hermano as Chicago Lew

Guy Usher as Parker

Rochelle Hudson as Telephone Operator

Wilfrid North as Judge

Sidney Miller as Student with Glasses Isadore Marks (uncredited)

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)

Dorothy Vernon as Purse Snatching Victim at Aquarium (uncredited)