Kang and Kodos Johnson are a duo of fictional recurring characters in the animated television series "The Simpsons". Kang is voiced by Harry Shearer and Kodos by Dan Castellaneta. They are green, octopus-like aliens from the fictional planet Rigel VII and appear almost exclusively in the "Treehouse of Horror" episodes. The duo has appeared in at least one segment of all thirty-one Treehouse of Horror episodes. Sometimes their appearance is the focus of a plot, other times a brief cameo. Kang and Kodos are often bent on the conquest of Earth and are usually seen working on sinister plans to invade and subjugate humanity.