Foul-tempered sourpuss Quentin Collins has been charged with murder. He has a visitor in jail. He believes her to be Alexis Stokes, identical twin sister of his late wife Angelique. In fact, she is Angelique herself, come back to life and bent on revenge.
Angelique urges Quentin to escape from jail and set about proving his innocence. Quentin is not the brightest fellow, so this sounds like a good idea to him. When the policeman in charge of the place comes in, he jumps off a chair, delivers a karate chop to his neck, and runs out.

From November 1967 to March 1968, Dark Shadows was a costume drama set in the 1790s. Another iteration of Angelique figured then as a witch. That Angelique deflected suspicion from herself by framing well-meaning governess Victoria Winters for her crimes. Vicki had shown significant brainpower early in the series, but by that point had apparently been eating lead coins for breakfast or something. She reached her absolute nadir when she talked her boyfriend, an insufferable jerk named Peter Bradford, into helping her escape from the Collinsport Gaol so that she could prove her innocence. But dumb as that idea was, at least Vicki was able to come up with it on her own. Quentin is so dense he needs Angelique to suggest it to him.