Quentin Collins is dead, his sister Judith would have you know. Their brother Carl is not so sure, but Carl is quite daft. So when high-strung governess Rachel Drummond reports that Quentin has taken a seat in the rocking chair in her bedroom, Judith is exasperated. She orders Carl to stop quivering and go into Rachel’s room himself to look at the rocking chair. Carl obeys Judith, and sees that the chair is vacant. Judith then orders Rachel to accompany her to the drawing room to see Quentin resting in his coffin. To Judith’s consternation, they see that the coffin is empty.
Judith and Rachel wonder who is playing morbid games with Quentin’s corpse. Of all the residents of the great house on the estate of Collinwood, Carl would seem to be the most obvious suspect. He is not only mentally unbalanced, but is also an inveterate prankster whose practical jokes are often disturbingly unpleasant. However, Carl is quick to break into maniacal laughter when he sees that the targets of his japes are uncomfortable, and he is not laughing now. He seems to be quite sincerely terrified. So Judith sends Carl upstairs to see if the body has been returned to Rachel’s room.
While the ladies are alone in the drawing room, Judith and Carl’s distant cousin Barnabas arrives. Judith tells Barnabas what has happened. When Judith expresses puzzlement as to how a dead body could be moved in and out of Rachel’s bedroom without using the door to the corridor, Barnabas mentions that there is a secret panel in the room. Judith is startled. She asks Barnabas how he, who only arrived from England a few weeks before, could possibly know about that panel. He claims that he read a “rare volume” by “the architect of Collinwood.” Judith does not seem entirely convinced, but she lets this explanation pass unchallenged.
Carl does not find the body in Rachel’s room, but he does notice something behind the drapes in the corridor. He pulls them apart to see Quentin. Carl screams. Quentin lumbers towards Carl and begins strangling him. Carl collapses, and Quentin leaves him on the floor.
Carl comes to in the drawing room. He tells Barnabas, Judith, and Rachel what happened. Judith cannot believe that Quentin has risen from the grave, and Barnabas takes it upon himself to tell her about zombies. He claims to have seen a zombie and to have witnessed ceremonies used to put them to rest while he was a young man on the island of Martinique.
Judith agrees to let Barnabas try his mumbo-jumbo. While the ladies are upstairs, Barnabas and Carl are in the drawing room, burning some potpourri next to Quentin’s coffin. Quentin comes lumbering in, and they withdraw to the shadows. The fun Jonathan Frid and John Karlen had working together is one of the most enjoyable things to see on Dark Shadows, but they get a little bit carried away in the moment when Barnabas and Carl hide. As they scurry off, they are so obviously a couple of kids playing that we are distracted from their otherwise outstanding performances.
Quentin comes back and resumes his place in the coffin. At Judith’s insistence, Carl and Barnabas bury the coffin on the grounds and pour cement over it. Judith assures Rachel that this means Quentin will not come back. Rachel is disappointed when Judith says she believes that Barnabas has gone back to the Old House on the estate, where he is staying. Since they have had such an exhausting night and it is almost dawn, Judith assumes that Barnabas will want to go to bed. Judith herself does retire.
Barnabas comes back and tells Rachel that he had to make sure she was all right. She thanks him, and says that during the day she will be leaving Collinwood, never to return. He asks her to reconsider. He says that he wants to see her again, but that he has to leave immediately and he cannot possibly return until the following night. He will not tell her why. Regular viewers know that Barnabas is a vampire and that he will turn to dust if he doesn’t get back into his coffin in a few minutes and stay there until sundown. Barnabas doesn’t seem to think that his relationship with Rachel has come to a point at which he can share secrets like that with her, so he evades her questions and rushes off. Rachel heads upstairs.
We see the doors open by themselves and hear the wind. Thinking Barnabas has returned, Rachel hurries down. Baffled that no one is there, she goes outside. She turns and sees Quentin. He plods towards her, and she faints into his arms. This impressively well choreographed movement brings us to a dramatic conclusion.
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