Frankenstein Must Be Destroyed (1969)

Continuity mistake: Frankenstein buys a sprig of freesias as a buttonhole: two yellow flowers and a purple. The sprig immediately changes into two purple flowers and a yellow. When Frankenstein meets Mrs Brandt and they go into the drawing room, the flowers are two purples and a red with yellow centre. Once in the cellar to see Mr Brandt, the red goes, and a yellow is back with two purples. (00:57:45 - 01:03:55)

Professor Richter: I have become the victim of everything that Frankenstein and I ever advocated. My brain is in someone else's body.

Professor Richter: I fancy that I am the spider and you are the fly, Frankenstein.

Baron Frankenstein: Had man not been given to invention and experiment, then tonight, sir, you would have eaten your dinner in a cave. You would've strewn the bones about the floor then wiped your fingers on a coat of animal skin. In fact, your lapels do look a bit greasy. Good night.