In the first episode, the team unearths previously unseen documents including the full statement of Fred West's ‘appropriate adult', Janet Leach, that contains details about the location of ‘the farm', where it has long been suggested up to 20 more victims may be found.The team studies newly revealed records of discussions between Fred West and his lawyer in which Fred talked about other crimes involving himself, Rose West and his brother, John West.

In the second episode, members of the family of Mary Bastholm, who was almost certainly abducted and murdered by West in 1968, but who has never been found, speak to the programme as police excavate the basement floor of the cafe.