He-Man and the Masters of the Universe (1983)

S2E58 Mistaken Identity

Tharen feels insecure about his girlfriend Careel's fascination with He-Man, so he deceives her into believing he is the hero's secret identity, hoping to win her over. Meanwhile, in Eternos prison, a criminal scientist named Galen Nycroft has smuggled in a mysterious machine designed to boost his abilities. This device transforms him into Modulok, allowing him to escape and plot against He-Man, aiming to impress Skeletor for recruitment. When he overhears Tharen claiming to be He-Man, he captures him, mistaking him for the hero's alter ego. Can the real He-Man save Tharen and protect his true identity?