ThunderCats (1985)
S03E11 Key to Thundera
Episode Overview
In an attempt to read the Book of Omens, Lion-O peers through his sword at the tome and is instantly pulled inside. A mysterious voice inquires if he possesses "the key," to which he responds negatively, triggering four dragon heads to unleash flames at him. Meanwhile, Snarf witnesses Lion-O's predicament and tries to alert Cheetara, but is also drawn into the book. Observing all of this, Mumm-Ra heads to the cats' lair to seize the book and plans to destroy it with Lion-O trapped within. Coincidentally, Panthro stumbles upon a peculiar key on Thundera, and he and Tygra return to Third Earth unaware of its purpose. Just as Mumm-Ra is about to incinerate the book, Lion-O calls for his sword, which miraculously brings him and Snarf back to safety. In a twist, Mumm-Ra uses the sword to look at the book and gets pulled in,
