Crash Corrigan, a recent graduate of Annapolis, and Diana, a go-getting reporter, join Professor Norton for a search for the source of a string of earthquakes, Atlantis. They ride Prof. Norton's rocket submarine searching the sea and little Billy Norton, the professor's son stows away, of course. When they find Atlantis they are caught in a war between peaceful Atlanteans, note their white capes, and war-monging Atlanteans, note their black capes. After many harrowing moments for Crash, Diana, Prof. Norton and Billy, they barely get away with their lives when they escape a tower of Atlantis raised to the surface for the sole purpose of dominating or destroying the Earth (Which one depends on the compliance of the upper world dwellers.)
Ray Corrigan
as Ray 'Crash' Corrigan
Lois Wilde
as Diana Compton
Monte Blue
as Unga Khan
William Farnum
as Sharad
Boothe Howard
as Ditmar
Raymond Hatton
as Gasspon
C. Montague Shaw
as Professor Norton
Lee Van Atta
as Billy Norton
Smiley Burnette
as Briny Deep
Frankie Marvin
as Salty
Lon Chaney Jr.
as Capt. Hakur
Lane Chandler
as Darius
