I Love a Mystery

The Devil's Mask

The Unknown

Jim Bannon

Jack Packard

Nina Foch

Ellen Monk

George Macready

Jefferson Monk

Barton Yarborough

Doc Long

Carole Mathews

Jean Anderson

Lester Matthews

Justin Reeves / Mr. G

Ernie Adams

Gimpy (Uncredited)

Gary Bruce

Intern (Uncredited)

Joseph Crehan

Police Captain Quinn (Uncredited)

Franklyn Farnum

Reporter (Uncredited)

Gregory Gaye

Dr. Han (Uncredited)

Fred Graff

Morgan (Uncredited)

Leo Mostovoy

Vovaritch (Uncredited)

Frank O'Connor

Jason 'Pegleg' Anderson (Uncredited)

Matty Roubert

Newsboy (Uncredited)

Cosmo Sardo

Reynolds (Uncredited)

Harry Semels

Mr. G's Doorkeeper Servant (Uncredited)

Bhogwan Singh

Villager (Uncredited)

Pietro Sosso

Street Musician (Uncredited)

Isabel Withers

Miss Osgood, Ellen's Nurse (Uncredited)

Kaye Dowd

Girl on Bridge (Uncredited)

Carlyle Blackwell Jr.

Man on Bridge (Uncredited)

Gene Stone

Waiter (Uncredited)

Monty O'Grady

Restaurant Patron (Uncredited)

James Conaty

Restaurant Patron (Uncredited)

Dick Gordon

Restaurant Patron (Uncredited)

Jay Eaton

Restaurant Patron (Uncredited)

Harold Miller

Restaurant Patron (Uncredited)

Larry Steers

Restaurant Patron (Uncredited)