Brake My Wife, Please (S14, E20-311)

You can pinpoint the moment where Homer's hip breaks (and a few people
already know where he's going to fall).

Plot Summary
Bart gets taken to the hospital after he suffers some injuries at the aquarium.  With the unavailable Homer holding the insurance card, the family is forced to wait around for him.  When he finally does arrive, Marge convinces Homer to get a cell phone.  Homer, of course, tries to drive while using it, when Barney suggests Homer get a hands-free model.  While doing so, Homer is convinced to buy every other thing one can plug into a car, and he's got so many distractions within his car now, he rather easily drives his car into the sea.

Homer's license is now revoked, and Marge is forced to do all the driving chores.  With Marge off doing one such chore, Homer is stuck at home.  Wanting to go to Moe's, Homer decides to just walk there instead, but along the way comes to liking the activity of walking.  Marge, meanwhile, is becoming overwhelmed with driving people around town all the time, to where she could break down at any moment.  Homer, though, continues to enjoy his walking, so much so that he starts up a song about it, but its interrupted abruptly when Homer is hit by a car - Marge's car to be exact.

With his pelvis broken, Marge can't explain why she hit the gas pedal instead of the brake in that accident.  She also 'accidentally' spills soup on Homer and trips him up as well.  Homer comes to realizes that Marge is trying to hurt Homer, and Marge lets it slip that she secretly hates him.  After one hour's worth of marriage counseling, Homer decides to organize a large party in the backyard dedicated to Marge.  Marge loves it, and her subconscious tendencies to murder Homer probably subside.

Quick Review
I should really come up with a term for episodes that start strong but fade at the end, like this episode.  This episode, which started off as a rather wacky tale of Homer enjoying walking, soon devolves into another marriage episode, and the dinner scene at the end just wasn't funny at all.  It completely bogs down what had been an otherwise fine episode.

Final Score: 7.3