Thundarr, Princess Ariel, and Ookla come to the aid of the Mok Chieftain Oblach against Captain Kordon, Queen of the River Pirates, who is after the Moks' hidden treasure and intends to use the "fire lances of the ancients" to get it. Thundarr learns that these "fire lances" are actually 20th century torpedoes and rallies the Moks to defend the ruins of a U.S. Navy base against being captured by the River Pirates.
| Name | Type | Role | |
|---|---|---|---|
| Alan Dinehart (II) | Guest Star |