Recovering vampire Barnabas Collins has determined to let himself into a house occupied by suave warlock Nicholas Blair. He knows that Nicholas is harboring Frankenstein’s monsters named Adam and Eve, that Eve is the reincarnation of a homicidal maniac, and that Nicholas has sinister plans for the pair. Once in the house, he intends to kill Eve.
Most of the episode is taken up with Barnabas’ preparation for this mission. He works with his friends, mad scientist Julia Hoffman and occult expert Timothy Eliot Stokes, to ensure that Nicholas will be out of the house when Barnabas gets there. When he goes into the room where he expects to find Eve, Barnabas discovers that she is not there. Instead, he is greeted by his erstwhile wife, Angelique. Angelique is now a vampire. We end with her baring her fangs at him.
Beneath all the homicidal and fantastic elements is a classic situation of farce. A man sneaks into a house hoping to meet a young woman, only to come face to face with his ex-wife. There are several notes of intentional comedy. Keeping Nicholas distracted, Stokes gives him a long lecture about the history of the Collins family. When he starts in on the details of their shipping interests, Nicholas squirms, jumps up, and thinks of someplace else he ought to be. Stokes and Julia destroy that excuse, and Nicholas sinks sadly back into his chair, bracing himself to hear more.

When Barnabas first enters Eve’s room, he thinks he sees a figure in her bed, only to find that there are pillows piled up under the covers. Angelique pulled that on him in #403, and Julia did the same thing in #291. Longtime viewers are left wondering when he will fall for the same trick a fourth time.
I do wish writer Gordon Russell had called on his frequent collaborator Violet Welles for help with this one. There are four or five nice laughs, but the tone immediately subsides back to seriousness between them. Welles had a gift for glittering dialogue that could have kept us chuckling throughout.