As the entire world went "space action" crazy at the end of the Seventies, Hanna-Barbera reconvened its Sci-Fi superstars Space Ghost and the Herculoids for another round of adventures. Joining the sixties sci-fi faves in their interstellar battle against evil were newcomers Teen Force and Astro and the Space Mutts (yes, that Astro!).

• Gary Owens
• Alexandra Stewart
• Steve Spears
• Frank Welker
• Michael Winslow
• Darryl Hickman
• Michael Bell
• Lennie Weinrib