The Fighting Marines

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.

• 
  Joseph Kane
• 
  B. Reeves Eason

• 
  Grant Withers
  Cpl. Larry Lawrernce
• 
  Adrian Morris
  Sgt. Mack McGowan
• 
  Ann Rutherford
  Frances Schiller
• 
  Robert Warwick
  Col. W. R. Bennett
• 
  George J. Lewis
  Sgt. William Schiller [Chs. 1-4
• 
  Pat O'Malley
  Capt. Grayson [Ch. 1
• 
  Victor Potel
  Fake Native Chief [Ch. 12
• 
  Jason Robards Sr.
  Kota
• 
  Warner Richmond
  Metcalf
• 
  Robert Frazer
  H.R. Douglas
• 
  J. Frank Glendon
  M.J. Buchanan
• 
  Donald Reed
  Pedro
• 
  Max Wagner
  Gibson
• 
  Richard Alexander
  Ivan
• 
  Tom London
  Miller
• 
  Jim Corey
  Karlsson