The BBC also has close contacts with the National Film and Television Archive, which is part of the British Film Institute and its "Missing Believed Wiped" event which was first held in 1993 and is part of a campaign to locate lost items from British television's past. There is also a network of collectors who, if they find any programmes missing from the BBC archives, will contact the corporation with information—or sometimes even the actual footage. Some examples of programmes recovered for the archives are "Doctor Who", "Steptoe and Son", "Till Death Us Do Part", "Dad's Army", "Letter from America", "The Likely Lads", and "Play for Today".