Continuity mistake: When Snoopy arrives at the Halloween party, he slides down a set of curtains and then hides behind those curtains. In the same shot, Lucy approaches a tub of water atop which five apples are floating. When the shot changes, there are only four apples floating in the tub and Snoopy has now somehow gotten into the tub and is hiding under the water. The action is constant. How did Snoopy get from behind the curtain to under the water? (00:18:30)Professor Zed
Continuity mistake: After choosing their pumpkin in the patch, Lucy is seen walking through a fence via a missing plank. The view then switches to the other side of the fence. Linus attempts to shove the huge pumpkin through the fence, but it won't fit. We then hear Linus rolling the pumpkin to the far end of the fence after which Linus and the pumpkin come back into view. However, after initially trying to get the pumpkin through the fence, although we have a great view through the fence, we never see Linus or the pumpkin go past the missing plank. (00:01:10)Professor Zed
Trivia: Just after Linus seals his letter to the Great Pumpkin in an envelope, he walks past Lucy who is sitting on the floor watching TV. In her hands, Lucy is holding an issue of TV Guide Magazine. On the cover? Lucy, sitting on the floor in the same position, wearing the same blue dress. (00:07:00)Professor Zed
Trivia: Kathy Steinberg, the actress who voiced Sally, almost had to be replaced. Just as they were approaching the end of her recording sessions, Steinberg's mother rang executive producer Lee Mendelson one night in a panic because Kathy had a loose tooth and the gap in her teeth could cause a lisp in her voice that would sound different from the dialogue they had already recorded. The crew had to rush Steinberg into the recording studio as soon as it opened in order to get the rest of her lines on tape. Mendelson said that Steinberg's tooth dropped out as she spoke her last line.