Corrected entry: In the shot of Smithers, right after Moe says "Your queen is back", Smithers' eyebrows overlap his glasses, and you can see the outline of his glasses on his eyebrows.
Corrected entry: Mike Scioscia's (the guest star) hat changes from red filled at the start of the roller coaster ride and ends up being white at the end.
Continuity mistake: When Homer's Vegas wife shows him the video in front of Marge, it shows Homer kissing Ned. This didn't happen when she showed it in the Vegas episode.
Tree House of Horror X - S11-E4
[The Simpsons are driving down a road as fast as possible.]
Homer: Dear God, it's Homer. If you really love me you'll save my life now.
[The gas needle immediately drops to empty and the car stops.]
Homer: D'oh.
Trivia: The Simpsons holds the record for most guest stars; it is also the only non-variety show to have had appearances from three former Beatles (Paul, George and Ringo).
Question: Which episodes feature the "Howling Dog" (usually used on outside shots of buildings)?
Correction: After multiple viewings, I think his eyebrows go under his glasses, but just give the illusion of his eyebrows going over his glasses.
Nikolai