Waylon Smithers appeared an episode of The Simpsons that originally aired on January 21, 1990, and that has Homer promoted to what position?
Waylon Smithers:  Smithers first appeared in the episode "Homer's Odyssey", although his voice could be heard in the series premiere "Simpsons Roasting on an Open Fire". Homer's Odyssey (The Simpsons):  In this episode, Homer becomes a crusader for citizen safety in Springfield, and is promoted to his current position as Nuclear Safety Inspector for the entire power plant.
i don't know