First appearing in the 1990 episode titled "Treehouse of Horror," Kang and Kodos are recurring alien characters in what television series?

These two green aliens, known as Kang and Kodos Johnson, are recurring characters in The Simpsons. These villains not only appear in the "Treehouse of Horror" series, but they also serve as occasional antagonists and commentators in the episodes.

Asked by Rachel Bortles · Last updated 4 years ago · 1.9K views · SOURCE