Cast
The CINCUS [Ch. 1] / Adm. Colby - The CINC-US [Ch. 1]
Mill Henchman [Chs. 5-6] / Lead Henchman at Mill [Ch. 5]
Witch Doctor Koloka [Chs. 6-7] / Koloka [Chs. 6-7]
Admiral Warburton [Ch. 1] / Adm. Warburton [Ch. 1]
Native Henchman at Mill [Ch. 5] / Native Thug at Mill [Ch. 5]
Henchman Corley / Corley - Henchman
Gang Radioman Barker / Parker - Saboteur Radio Operator [Chs. 4-12]
Enemy Sub Capt. Tranker [Ch. 1] / Tranker - Submarine Z-37 Captain [Chs. 1-2]
Radio Room Henchman [Ch. 10]
Henchman-Helmsman [Ch. 3]
Lt. Cdr. Grady / Lt. Cmdr. Grady [Chs. 1, 12]
Taylor's Lab Assistant [Ch. 8] / Lab Assistant [Chs. 8-9]
Henchman Spike / Spike - Henchman
Sub Capt. Jackson [Chs. 7, 9] / Jackson - Z-40 Submarine Captain [Chs. 7-9-10]
Capt. Sanders, of the "Tarleton" [Chs. 3-4] / Captain of the S.S. 'Tarleton' [Chs. 3-4]
Gang Chemist Taylor [Chs. 8-9] / Taylor - the Chemist [Chs. 8-9]
Henchman Butch [Ch. 8] / Butch Clint - Henchman [Ch. 8]
Destroyer 620 Helmsman [Chs. 1, 9]
Sam Munn, henchman [Ch. 8] / Sam Munn / Rocky- Henchman
Saboteur Kramer [Chs. 3-4] / Kramer - [Chs. 3-4]
Capt. Fairfield, of the "Batavia" [Chs. 1-2] / Capt. Fairfield [Chs. 1-2]
Seaman Chapman / Chapman - Seaman
S.S. 'Baratavia' Crewman [Ch. 2]
Henchman Prindle / Prindle - Henchman
Diving Boat Raider [Chs. 10-11]
Pat - Smelter Foreman [Ch. 5]
