Factual error: The helmet is a Cooper/Bauer HH3000 that wasn't made until 1989 or 1990. (00:26:30)
Continuity mistake: In an earlier episode, FBI agent Stan is shown parking on the left of the drive and going into the house on the left. In episode 2.8, Elizabeth is shown coming out of her house to see the New Car, but it's the same house on the left that was shown to be Stan's house earlier. Same house used for both families.