David Gurney (Richard Long) awakes in his bed with his wife asleep beside him (a double bed in the 60s!) but he is fully clothed and hung over. The worst part is, his wife doesn't know who he is, and neither do the people he works with or anyone else. Everyone except our protagonist seems to have amnesia. The psychiatrist says he has had a loss of orientation. He disagrees and frantically goes searching for the one little detail that whoever is playing a trick on him has forgotten to cover. He thinks he finds it.
Long, quite convincing as a man who is sure of who he is but no one believes him. A twist ending I didn't see coming with Long's wide and frightened eyes.
A note: something I noticed in watching a Netflix run of it. When Gurney leaves his house, after fighting with his wife who says she doesn't know him, he looks up from his car and sees her looking down at him from a window. He says, "Nut!" but by reading his lips it looks like he says another word before "Nut!" that they have muted out - an appropriate word under the circumstances, but not in 1960s TV and even today, only on cable. In fact, it appears this was almost the first use of that word on TV.