Depends on whom you ask. Those officially searching for them have to play things very close to the vest now. They found all of The Web Of Fear in 2011 in the archive of a Nigerian tv station, and then Episode 3 vanished before they could be returned. It’s thought someone sold it to a private collector. All because news leaked out about it.

There have long been rumors about film collectors sitting on other missing shows, just for the twisted satisfaction of having them so nobody else can.