“Mr. Plow” is the ninth episode of Season 4. It originally aired on November 19, 1992. The episode was written by Jon Vitti and directed by Jim Reardon.
At the local auto show, Homer is pressured into buying a snow plow truck and he starts up a surprisingly successful business as “Mr. Plow.” Things go well for Homer until Barney starts his own slow plow business and steals all of Homer’s customers.