 The agreement with the BBC required that all such episodes should be destroyed or returned, although it is known that some were souvenired by staff, since at least five ended up in the hand of a private collector, and three were seen by some Sydney fans in the 1970s.But despite these, and a few episodes turning up in the ABC in the 1990s, nothing new has since come to light (as of March 2009).The ABC archive went through a major review following the closure of the ABC's old Sydney studio headquarters at Gore Hill, and many "lost" film and video resources were rediscovered and the ABC has also begun the process of archiving old film and video materials in digital format (such as segments from the 1970s pop music series "GTK").