Montgomery Burns is the owner of the Springfield Nuclear Plant, and he is very old and evil. He's Homer Simpson's boss and has a loyal butler named Waylon Smithers, Jr. He releases hounds or uses trap doors if someone talks to him about something he's not interested in. He was a previous friend with a young Grampa Simpson in World War II. He attempted to kill Santa.
- His minifigure holds a bowl (a transparent minifigure head) which contains Blinky the Three-Eyed Fish who was mutated due to radiation from his power plant. Blinky first made a cameo appearance in the Episode "Homer's Odyssey" and made a bigger role in the episode "Two Cars in Every Garage and Three Eyes on Every Fish". The Inanimate Carbon Rod first appeared in "Deep Space Homer" where a inanimate carbon rod wins the Employee of the Week award.
- He is the only Springfield Nuclear Power Plant manager (Besides Homer Simpson) that is only made in physical form. All others only appear in Brick Like Me.
- Mr. Burns is voiced by Harry Shearer who also voiced Ned Flanders, Julius Hibbert and Scratchy.