Thundarr the Barbarian - Season 2 - Eps 5: Last Train to Doomsday
Thundarr, Ookla, and Ariel are in pursuit of a mummy-like Janus after he and a race of hawk mutants attack villages and the train route of Tye (the former swamp urchin from "Harvest of Doom"). The group is in for a surprise when it turns out Janus is actually Gemini (the two-faced wizard from "Secret of the Black Pearl") in disguise seeking revenge on Thundarr. Tye, from "Harvest of Doom", returns as a train driving "businesswoman".
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)