For those who care--this was not a stage play, but an hour long drama transmitted in the "Bob Hope Chrysler Theatre" anthology series in October 1965. The stars were Shelley Winters and Jack Hawkins.
According to a recent notice on an IMDB board, episodes of the Chrysler Theatre are currently being broadcast on a new TV network, the "Retro TV Network." Apparently there was an old syndication package from episodes of this show that was making the rounds back in the 1980s under a title something along the lines of Universal Star Theatre. I suppose time will tell whether this episode eventually shows up. I have contacted a number of vintage TV collectors and sales people over the years about this and nobody has ever had it.
G.