I'm gonna climb on the "it wasn't too bad" wagon. The idea of the towing job wasn't terribly original, and I'd prefer if the result of it been more intregal to the story:
But the Maggie/Marge plot was touching AND well thought-out. Best Maggie-centric plot EVER, so if you like her character it's worth tracking down to watch it.
C+ because it was average, not offensive.