Sue Malden
Sue Mallden is one of the most important figures in the recovery of missing episodes of Doctor Who.
Once the BBC realized they had made a mistake by junking early episodes of the programme, they hatched a plan to try to find them again. In the mid 1970s, they thus established the BBC Film and Videotape Library, and named Mallden as its first "archive selector". As the head of the library, one of her first accomplishments was to decide what programmes she would actively try to recover. Thanks in part to pressure from Ian Levine, the Doctor Who production office, and the outcry of the nascent fan community, she made Doctor Who a priority.
Then she began to piece together what had actually happened to the episodes, something that was not fully known at the time by the BBC. Perhaps her most significant discovery was that of the existence of two separate libraries. She quickly determined that the BBC's own library of videtaped masters had been entirely and quite systematically wiped, because the videoape medium itself was perceived to be more valuable than the information recorded on it. What was completely unknown to most employees of the BBC was that Pamela Nash had been buiding up her own library of 16mm telerecordings of the episodes at a separate library at BBC Enterprises. The simple existence of this second library resulted in the immediate recovery of some episodes — notably the entirety of The Daleks.
But it also led Mallden to an extensive paper trail. Nash's team had retain paperwork detailing where various prints of Doctor Who had been shipped and which countries had bought the episodes. This allowed Mallden and her successors to go on a global and sometimes fruitful hunt for various episodes.
While unable to recover every missing episode, nor directly responsible for every successful recovery, it is largely Mallden's work established the framework by which any episodes were able to be recovered at all.
As documentary subject
Mallden has been the subject of several fan interviews over the years. However, she is perhaps best known from her appearances in professional documentaries made about the phenomenon of missing episodes. She is prominent in the 1988 video documentary, The Missing Years]], which is included on the Lost in Time DVD release. She was more recently featured on the 2009 BBC Radio 4 investigation, Doctor Who: The Lost Episodes.