High Quality Content by WIKIPEDIA articles! Waylon Smithers, Jr., usually referred to as Smithers, is a recurring fictional character in the animated series The Simpsons, who is voiced by Harry Shearer. Smithers first appeared in the episode "Homer`s Odyssey", although he could be heard in the series premiere "Simpsons Roasting on an Open Fire". He is the consummate executive and personal assistant of Springfield Nuclear Power Plant`s owner Montgomery Burns.