Teela in the unnamed dimension.
An unnamed dimension appears in the 1983 animated series He-Man and the Masters of the Universe.
Skeletor once transported Castle Grayskull from Eternia to this dimension, with the Sorceress inside. In this dimension, she was unable to use her powers and abilities. Skeletor, who was not accompanied by any of his Evil Warriors, imprisoned the Sorceress and took her throne. He was unable to learn the secrets of Grayskull before He-Man and Teela tracked down the castle, however. When confronted by He-Man, Skeletor claimed that they were facing each other in his dimension now. But He-Man and the Sorceress tricked Skeletor by using the Window of Spirits, causing him to flee on a War-Sled, leaving his Havoc Staff behind. The Sorceress used her powers to give He-Man all the strength of the secrets of Grayskull so he could lift up the entire castle and hurl it back to it's original location on the planet Eternia.