One of the first episodes to delve into the depths of C. Montgomery Burns' true evil. Better yet, it features the first appearances of Springfield sleazeballs Dr. Nick Riviera and attorney Lionel Hutz (voiced by the late Phil Hartman).
Bart and Lisa's deadbeat bus driver moves in with the Simpsons. Noteworthy as one of the first episodes to focus mainly on one of Springfield's ancillary characters. There's also a brilliant Spinal Tap cameo.