A wealthy man's wife and her lover are tired of hiding their affair. They decide to make her husband believe that he's losing his mind. At first he's confused but then he realizes what they're trying to do. So he goes along with it.
Eventually the wife and her lover, realize that their business is losing money and they need her husband back. The husband is perfectly happy at the mental hospital where he's staying it and he's not leaving.
Thus getting revenge on his wife and her lover, while still maintaining his happy place at the institution. I liked this episode because it was humorouos. Not all of the Alfred Hitchcock episodes are full of seriousness and mystery and intrigue. Some of them are funny, I liked this one because their intentions worked against them and they deserved it.