The Penguin Pool Murder

Edna May Oliver

Miss Hildegarde Martha Withers

Robert Armstrong

Barry Costello

James Gleason

Police Inspector Oscar Piper

Mae Clarke

Gwen Parker

Donald Cook

Philip Seymour

Edgar Kennedy

Officer Donovan

Clarence Wilson

Bertrand B. Hemingway

James Donlan

Security Guard Fink

Gustav von Seyffertitz

Von Donnen / Dr. Max Bloom

Guy Usher

Parker