Lol TV Screw Up.

[JrDude]

I was watching a DVR King of the Hill, and the episode was an episode where Bobby tried to teach his mom how to ride a bike, the end of the episode was Bobby convincing his mom to give up and she never really learned. Then an episode where Bobby basically replaces Peggy as mom of the house, she gets mad off and steals a turkey he's making, her car is blocked by another car, so she steals and rides Bobby's bike.
So they intercourse ed up.
Any TV story screw ups you can recall? There seems to be many of them.

[jnfs2014]

Ash has crappy Pokemon and can't battle but somehow wins unless it's a tourney not named the Battle Frontier wat.

[Gwen Khan]

you can find continuity errors all the time in pretty much any show

[chaosgear]

virtually any show can end up on this thread, but they all fall before the name of the following show...


SEINFELD!!! 

[JrDude]

I'm not asking for you to name a show that has done this, I want you to name the screw up.