Along with 'The Problem with Power' and 'The Ancient Mirror of Avathar' these are the only episodes to see He-Man's reverse transformation back to Prince Adam.
We have seen Phantos before, in "She-Demon of Phantos", yet that episode implied it was one of Eternia's moons, whereas here it is a planet, with moons of its own. To solve continuity problems we can assume that the previous episode took place on the moon of Phantos, as in one of Phantos' moons rather than Eternia's.
In one scene, a miniature Panthor witnesses Adam transforming to He-Man- though presumably, as an animal, he is unable to tell the difference.
Evil-Lyn: And so, He-Man, those great, gorgeous muscles of yours...are totally useless!