A variety of people are searching for a long-hidden treasure somewhere on an island. Chapters: 1. The Isle of Fear, 2. The Ghost Talks, 3. The Phantom Duel, 4. Buried Alive, 5. The Girl Who Vanished, 6. Trapped by the Flood, 7. The Cannon Roars, 8. The Circle of Death, 9. The Pirate's Revenge, 10. The Crash, 11. Dynamite, 12. The Bridge of Doom, 13. The Mad Flight, 14. The Jaws of Destruction, 15. Justice
as Larry Kent
as Toni Morrell
as Carter 'The Shark' Collins
as Capt. Samuel Cuttle
as Roderick Gridley
as Dr. X
as Nurse Zanya
as Prof. Gault
as Dreer (Mole-Men Leader)
as George Brennan Westmore (Editor)
as Saltwater Jerry [Chs.1,4-7,13-15]
as Hawkins (the Butler) [Chs. 1-3]
as Det. Jameson [Chs. 4-7]
as Paul Thorndyke [Ch.1]
as Capt. Tom Stanton, alias Capt. Tom Faxton [Ch.1]
