Ricardo Montalban as Peter Moralas

Sally Forrest as Grace Shanway

Bruce Bennett as Dr. McAdoo

Elsa Lanchester as Mrs. Smerrling

Marshall Thompson as Henry Shanway

Jan Sterling as Vivian Heldon

Edmon Ryan as James Joshua Harkley

Betsy Blair as Jackie Elcott

Wally Maher as Tim Sharkey

Ralph Dumke as Jim Black the Tattooist

Willard Waterman as The Mortician

Walter Burke as The Ornithologist

Don Shelton as A District Attorney

Elsie Baker as Elderly Lady (uncredited)

George Brand as Man in Bedroom (uncredited)

Ralph Brooks as Reporter (uncredited)

Douglas Carter as Counterman at The Dunes (uncredited)

Mack Chandler as Doorman (uncredited)

Noble 'Kid' Chissell as Diner Patron (uncredited)

George Cooper as Reporter (uncredited)

John Crawford as Reporter (uncredited)

Lucille Curtis as Mrs. Harkley (uncredited)

Bert Davidson as Dr. Thorpe (uncredited)

King Donovan as Reporter at Beach House (uncredited)

Mike Donovan as Porter (uncredited)

Robert Foulk as Detective O'Hara (uncredited)

Jim Frasher as High School Boy (uncredited)

Ned Glass as Dr. Ben Levy, McAdoo's asst. (uncredited)

Eula Guy as Mrs. Fischer (uncredited)

Sherry Hall as Car Insurance Clerk (uncredited)

Bradford Hatton as Al - Grass Skirt Cafe Bartender (uncredited)

Jim Hayward as Constable Fischer (uncredited)

Perry Ivins as Alienist (uncredited)

William F. Leicester as Doctor (uncredited)

Arthur M. Loew Jr. as Sailor (uncredited)

Louise Lorimer as Mrs. Shanway (uncredited)

John Maxwell as Detective Kilrain (uncredited)

May McAvoy as Nurse (uncredited)

David McMahon as Detective Garrity (uncredited)

Ernesto Molinari as Portuguese Fisherman (uncredited)

Ralph Montgomery as Waiter (uncredited)

Matt Moore as Dr. Rockton (uncredited)

Melvin H. Moore as Oyster Shucker (uncredited)

Virginia Mullen as Neighbor (uncredited)

Allen O'Locklin as Photographer (uncredited)

Frank Overton as Guard (uncredited)

Juanita Quigley as Harkley's Daughter (uncredited)

Suzanne Ridgway as Bar Girl at Grass Skirt Cafe (uncredited)

John Roy as Guard (uncredited)

Maurice Samuels as Tailor (uncredited)

Fred Santley as Pawnbroker (uncredited)

Phil Schumacher as Diner Patron (uncredited)

Jack Shea as Policeman (uncredited)

Fred Sherman as Photographer (uncredited)

George Sherwood as Reporter (uncredited)

Mary Jane Smith as Daughter (uncredited)

Robert Strong as Policeman (uncredited)

Peter M. Thompson as Law Student (uncredited)

Charles Wagenheim as Baggage Clerk (uncredited)

Napoleon Whiting as Red Cap (uncredited)