Thundarr the Barbarian - Season 2 - Eps 3: Island of the Body Snatchers
The trio investigate a sector called the Mystery Zone where several ships get wrecked on an island. They learn the evil witch Circe is responsible as she needs a young sorceress to overcome a curse in which she will turn to stone if she leaves the island. When Ariel arrives with Thundarr and Ookla, Circe gets her opportunity as she switches bodies with her and becomes a threat to the others as she tries to leave the island.
About Thundarr the Barbarian

Title: Thundarr the Barbarian
First Air Date: 1980-10-04
Last Air Date: 1981-10-31
Status: Ended
Rating: 6.7/10 (from 24 votes)
Language: EN
Seasons: 2
Total Episodes: 21
Network: NBC
Genres: Animation, Sci-Fi & Fantasy, Action & Adventure
Production Companies: Ruby-Spears Productions
Synopsis
Thundarr and his companions Ariel and Ookla wander a devastated future Earth and fight evil wherever they find it.
Cast

Robert Ridgely
Thundarr (voice)

Henry Corden
Ookla the Mok (voice)

Nellie Bellflower
Princess Ariel (voice)

Dick Tufeld
Narrator (voice)