Appearing in "The Trouble with Titan..."
- ISAAC (Appears on screen)
- Earth-Demons (Impersonates Mentor and Eros)
- Lord Stellarax (First appearance)
- Lord Gaea (First appearance)
- Thanos (Mentioned) (Deceased)
- Giant Spiders
- Mentor (A'Lars)
- Elysius (First appearance)
- Kronos (Mentioned)
Races and Species:
- Prime Marvel Universe
- Stellarax's Spaceship
Synopsis for "The Trouble with Titan..."
- Synopsis not yet written