Continuity mistake: When the Gold Leader says to the Red Leader, "Red Leader, this is Gold Leader," at the start of the Battle of Yavin, the two Y-Wing fighters outside his cockpit suddenly disappear. This was fixed in the 2004 version. (01:46:05)
Continuity mistake: In the story titled "Quebec Province 1975", child witch Lucy gets back at her bullying cousin Angela by shrinking her to the size of a mouse. Minutes later, Angela looks up, lifts her hands over her head and begs for mercy. Obviously Lucy is preparing to step on her. But we see Lucy lifting her foot off the floor several seconds after Angela starts begging.
Continuity mistake: The film starts in Muncie Indiana. There is a scene in the hills near the town. There are NO hills near Muncie, it's flat as a board. (00:24:30)
Continuity mistake: The senator is tossed out of the boat and consumed (with the exception of his head) by the monster, and yet the boat is full of blood.
Continuity mistake: As Hal Holbrook's character is speaking with a mission technician, Holbrook's hands (holding a pen) keep moving between shots: one shot the hands are splayed out on his desk, the next shot his hands are cradling a pen, and then back to the hands splayed.
Continuity mistake: The spider lady and the vet go to the rancher's place to burn out the spider hill. While there, a bull runs out and collapses. While the spider lady is talking to the rancher's wife, her hands are by her side. When the camera switches to the wife's point of view, the spider lady's hands are in her coat pockets. When the view switches back, her hands are by her side again.