In addition to the main cast, Frank Welker voiced Nibbler and Kath Soucie voiced Cubert and several supporting and minor characters. Like "The Simpsons", many episodes of "Futurama" feature guest voices from a wide range of professions, including actors, entertainers, bands, musicians, and scientists. Many guest-stars voiced supporting characters, although many voiced themselves, usually as their own head preserved in a jar. Recurring guest stars included Dawnn Lewis (as Hermes' wife LaBarbara), Tom Kenny, Dan Castellaneta (as the Robot Devil), Al Gore, and George Takei, among others.