Deliberate "mistake": When Charlie stabs Dandridge in the hand with his pencil, he stabs the hand holding him by the neck. The depth of the wound on Dandridge's hand reveals that the pencil should have stabbed Charlie in his neck and given him a severe wound, if not kill him.

Continuity: In the beginning of the film where Charlie watches Dandride and Cole move the coffin into their house, there is a close-up shot of Amy removing her blouse. The film then cuts to a close-up again of Charlie and in the background Amy's blouse is still on (probably only visible in the widescreen version of the film).

Other: Before the wolf changes back into Evil Ed you can see the black cables pulling the fake wolf across the carpet.

Revealing: Charley stabs Jerry Dandridge in the hand with a pencil. Look closely as he removes it, you can see it comes out in an 'antenna' fashion with a sucker attached in the palm of his hand.

Plot hole: When Charlie and Peter Vincent are trying to save the Charlie's girlfriend, Peter says they can save her if they kill the vampire before dawn. When they knock out the windows in the basement to let light in, that's an indication it's not before dawn, it's after. Yet, they still save the girl.

Continuity: In the scene where Jerry Dandridge is about to drop Charley out the window, if you watch the upper right hand corner of the screen when he starts pushing him out, you see Charley's shirt rip from the nails in the window. But you never see, or hear about it again.