This is a rather better than average B feature, set in a modest respectable middle-class '30s-'50s suburb of houses with tidy front gardens, net curtain and a nosy neighbour.
A bored middle-aged housewife notices some odd occurrences at her neighbours house - a scream, the sudden departure of the wife, the return of the husband, his curious activities throughout the day - carrying bags of cement indoors, carrying a large tin bath also indoors. All very suspicious. She consults her husband who knows her habits and reassuringly dismisses her concerns.
So far precisely an episode of One Foot in the Grave - the type of neighbourhood, bizarre happenings with very dark interpretations.
Only the dark events are not imagined but completely real - as the audience to this crime-mystery know in the first few minutes. The happenings are completely beyond the imaginings of the suspicious neighbour.
I didn't guess the final revelation. Although it is fairly engrossing, a better production would have ramped up the tension and made the wife's manner less even as the conclusion approached.
My lasting impression is that One Foot in the Grave, now an established comedy classic was a genius comic twist on this fairly ordinary original. Or perhaps I am just imagining it?