Ian McShane trying to kill wife - episode?

sounds more like an episode of Thriller to me

There was an episode called "Sauce for the Goose" with an ending involving a walk-in freezer. I don't remember all the rest of it, but at the end a freezer repairman shows the wife that there is a bicycle tire hung over the hook that is supposed to catch the freezer door when it opens. He warns her that leaving the tire there could cause the door to bounce off the tire and close. After he leaves the room, she puts the tire back up on the hook and then goes upstairs and tells her husband to get some fish out of the freezer. He is suspicious and seeing the tire on the hook props the door open, they yells to his wife that he can't find the fish and he puts it deep in the freezer. He hides and when she nervously goes into the freezer to reach the fish he shuts the door on her and leaves her to freeze to death. Later, when he goes to make sure she is dead he forgets about the tire still being on the hook and the door does bounce off it and closes on him leaving him trapped inside to freeze to death as well. Does that match the episode you are thinking of? It was Robert Morse who played the husband though, not Ian McShane.