The X-Men made their first ever animated appearance on the The Marvel Super Heroes TV series in 1966 with Professor X commanding the original X-Men line-up of the Cyclops, the Beast, Marvel Girl, the Angel, and Iceman. The X-Men appeared in the Sub-Mariner episode "Dr. Doom's Day / The Doomed Allegiance / Tug of Death". Though the episode was adapted from Fantastic Four #6 (1962) and Fantastic Four Annual #3 (1965), Grantray-Lawrence Animation did not have the rights to the Fantastic Four (their series was produced by Hanna-Barbera), and so instead substituted the X-Men. The X-Men are never referred to in this episode as the X-Men but rather as the Allies for Peace. The characters kept their original looks and individual names from the comics..