Mrs. Peel is bequeathed an old house by an uncle Jack, whom she never knew existed. In the event, he did not exist. The house is a former lunatic asylum and it is all a ruse by a vengeful ex-employee of Mrs. Peel's to submit her to mind games which will drive her insane.
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Did You Know?
"The House that Jack Built" was written to focus on Emma Peel, allowing Patrick Macnee
some time off by only featuring him in a few scenes. The opposite was done on the "The Girl from Auntie" (4.17). See more
(at around 55 mins) A crewman looking down can be seen in the reflection of the machine. See more
Pongo, please listen. She's got a key with her. It's a perfectly ordinary key, but there's something strange about it.
The convict character is named Burton in the credits, but at no time in the episode is his name every spoken. See more