A project devoted to preserving and restoring rare episodes of a South African radio series based on the popular UK television series, "The Avengers", has started up their restoration efforts again after a couple of years in hiatus.
The program was broadcast as a five-day-a-week serial and was based on scripts from the tv series using South African actors. At the time, television in the country wasn't well developed, but people got familiar with "The Avengers" through film exchanges, which rented 16mm films much like today's video stores. Radio drama was still a major art form in South Africa, so the tv show was turned into a radio show.
You can see more info on the show and download restored episodes here.