copies of the four episodes were believed lost in the mass deletion of episode recordings in the 1970s, with bbc enterprises deleting their copies. the bbc film library retained a copy of "the wheel of fortune" that it had accidentally acquired, but a copy of "the lion" had been junked from the library by 1972. in 1999, a film copy of "the lion" was discovered by neil lambess and paul scoones in the collection of bruce grenville, a film collector in new zealand; the new zealand broadcasting corporation had acquired the story in 1960s, but did not transmit it. the story had been thought to be one of the very few for which no off-air soundtrack was known to exist, until copies were located in 1995.