What's this film or TV programme from the 80's, possibly early 90's:
A man and a woman in a motel-looking room. Years before the woman's partner or husband had disappeared from the same room.
He had had broken spectacles. I think the two of them had had an argument. When he closed the door, he vanished.
Now the woman has returned with her new partner [or a friend?] to try and re-enact the whole thing to try and work out what happened. This new man now also has broken glasses.
He is about to close the door in exactly the same way as had happened so many years before when the woman suddenly looks horrified. She goes to stop him, as though something has just dawned on her but it is too late. This man also disappears.
I'm afraid I don't remember anything else except that I have a vague sense of it having a 70's feel to it. We've already ruled out Tales of the Unexpected. Now we're a little stuck.