What is the worst episode with a Thomas lead? (excluding AEG)

I plan on reviewing the worst episodes starring the Eight Famous Engines, plus Emily, Nia, Diesel, international episodes in general, specials, a wild card up to a vote, and finishing off with the worst overall episode. AEG doesn't count. For specials, the BWBA half-hour thingies don't count (the exception to the exception being The Royal Engine), neither does Magic Railroad. YouTube toy shorts don't count. And finally, please keep the comments short. I don't need others' opinions in the comments. Just the episode name. Most upvoted comment wins. And go!