Corporal Larry Grant and Sergeant "Mac" McGowan, of the United States Marine Corps, are rival for the love of Frances Schiller, but team up to hunt down "The Tiger Shark," a mad, scientific wizard who is holding Sergeant William Schiller, Frances' brother, a prisoner on a wild, jungle island in the Pacific.
Grant Withers
Adrian Morris
Ann Rutherford
Robert Warwick
George J. Lewis
Pat O'Malley
Victor Potel
Jason Robards Sr.
Warner Richmond
Robert Frazer
J. Frank Glendon
Donald Reed
Max Wagner
Richard Alexander
Tom London
Jim Corey