Good news, Ivytree, of sorts. The ironically-named LostShows reports that it does exist, but that doesn't guarantee that it will be released.
I hope you get to see it again, anyway.
This was an early (1959) BBC crime doocudrama written by Colin Morris and directed by Gilchrist Calder. In the cast were Lawrence James, Jack Rodney, Maxwell Shaw, and Neil McCarthy.
Does anyone know if this even exists? Has anybody seen it?
It was re-run in April, 1964; it existed in 1972, because it was shown as part of a "Best of the BBC" retrospective. (Would they still have wiped it after that?)
If anyone knows any more about it, I would love to hear about it; and, needless to say, I'd love to see it in any condition.