On Jan. 23, 1985, the first episode of ThunderCats aired, introducing the world to Lion-O and the rest of the crew from the planet Thundera. Over the next four years, 129 more episodes would air. Even though the series ended in 1989, it didn’t leave the minds of kids who loved these heroic cat-people. ThunderCats has certainly endured.
For lifelong ThunderCats fans stuck at their computer, we’ve gathered some bits of trivia about the series that will have you humming the theme song all day.