The Extremes

The Extremes are a group of four alien musicians who appeared in The Jim Henson Hour, Muppet Time and Muppets Tonight. It is unknown for these to be found on other cartoons even though their appearance ended after Muppets Tonight. They are featured in what Nigel refers to as the "Koozebanian dance number", indicating that they might be from Koozebane even though they have no relationship to Koozebanians.