Viewers are more familiar with two hander episodes these days. Eastenders pioneered it for British soap operas.
Here is an early example. For the bulk of the episode is a showdown between two men. It might have been a novelty at the time but lost it impact over the years.
Clemens is a nervous man who demands some answers from Marker who in turn thinks that Clemens is a timewaster. A lonely man who just wants to whinge to some stranger.
At first Clemens wants to hire Marker as he believes his wife is having an affair. It transpires that he had hired Marker many years ago for a similar case.
Marker found evidence of adultery, Clemens got divorced and lost custody of his kids.
Clemens feels like a nobody, a small cog in the machinery of life. Unhinged, depressed, he has tracked down Marker and blames him for his woes.
In return Marker does not take things lying down. He was doing his job as an enquiry agent and gives Clemens some tough love and home truths.
In hindsight this may be a mistake. It is a dark episode. Clemens is a man whose world has fallen apart and he might not be entirely blameless of it.
Both Alfred Burke and Paul Rogers carry it off with aplomb.