Corrected entry: In the scene where Barnabas has just been released from his coffin, he chases Daphne down the street and she gets into her car and just as she is trying to lock the passenger door, Barnabas opens that door and grabs her. There is only one problem: this is a man who only opened doors in the 18th century. How did he know how a car door opens and figure it out instantly?
House of Dark Shadows (1970)
1 corrected entry
Directed by: Dan Curtis
Starring: Grayson Hall, Jonathan Frid, Roger Davis, Kathryn Leigh Scott
Revealing mistake: At the very end, a bat flying out of the mist toward the camera was intended to imply that Barnabas had taken bat form and could thus be around for a sequel. But through the haze, Barnabas can still be seen lying on the floor when the bat flies past. (01:36:25)
Professor T. Eliot Stokes: Julia! You're in love with him! Well, I pity you.
Correction: A door handle is pretty easy to figure out just by looking at it, especially one which has a handle and plunger button. They also had latch-type doors since earlier than the 18th century, so he's familiar with the principle. Besides which, he could have also observed Daphne using the door to get into it.