She-Ra: Princess of Power S01E04 - Reunions

Continuing the story of the previous three episodes, He-Man and She-Ra find out they are twins who were separated while infants by Skeletor and Hordak. Skeletor, a pupil of Hordak, was left behind by his master and in return he betrayed him to save his skin. Flying on a Swift Wind, He-Man and She-Ra return to the rebellion in their regular form and explain to everyone that Adora is no longer Hordak's captain. Upon freeing Glimmer's mother, the queen, from the evil harpy's clutches, Adam and Adora figure the rebellion is no longer weak to be left to fend for themselves so the two of them return to Eternia. Hordak spots this from his ship and turns into a rocket and in the nick of time enters the portal himself before the portal closes. While Adam and Adora have a pleasant surprise for their parents, Hordak goes to Snake Mountain to check on his own throne only to be attacked by Skeletor. The two of them stop in mid-battle and agree on temporary alliance while turning their sight on their common enemy.