Undersea Kingdom

Ray Corrigan

— Ray 'Crash' Corrigan

Lois Wilde

— Diana Compton

Monte Blue

— Unga Khan

William Farnum

— Sharad

Boothe Howard

— Ditmar

Raymond Hatton

— Gasspon

C. Montague Shaw

— Professor Norton

Lee Van Atta

— Billy Norton

Smiley Burnette

— Briny Deep

Frankie Marvin

— Salty

Lon Chaney Jr.

— Capt. Hakur

Lane Chandler

— Darius

Jack Mulhall

— Andrews

John Bradford

— Joe

Malcolm McGregor

— Zogg

Ralph Holmes

— Martos

John Merton

— Moloch

Ernie Smith

— Gourk

Lloyd Whitlock

— Clinton