In the 1960s, the BBC screened 253 episodes of Doctor Who starring William Hartnell and then Patrick Troughton as the time travelling Doctor. Yet by 1975, the Corporation had wiped the master tapes of every single one of these episodes. Of the 124 Doctor Who episodes starring Jon Pertwee shown between 1970 and 1974, the BBC destroyed over half of the original transmission tapes within two years of their original broadcast. Wiped! looks in detail at how the episodes came to be missing in the first place, and examines how material subsequently came to be returned to the BBC. Along the way, those people involved in the recovery of lost slices of Doctor Who's past tell their stories in candid detail, many for the very first time.