This story was one of the best Murder She Wrote episodes as Jeffrey Lynn, Martha Scott, and Harry Morgan all play the same roles they did in a film Strange Bargain made three decades earlier. With the passage of real time giving the players aid no amount of makeup could, a whole story is reinvented with flashbacks from the old film worked into the plot.
Jessica Fletcher usually doesn't investigate 30 year old murders, but the story that Jeffrey Lynn tells her about in jail for a crime he didn't commit certainly intrigued her. With these three and a few others she backtracks and proves what actually happened.
The film was Strange Bargain and by making such a bargain Lynn really put himself in a jackpot. Good thing Angela Lansbury was around to straighten it all out.