Sam's memorial initiative on the anniversary of Amy Tennant's disappearance gives the team a lead when a friend of the family is seen stealing something from the missing child's bedroom, and a child's corpse is found buried on an allotment. Emma and Diane investigate an abandoned van and unwittingly set loose a flock of frightened sheep, which turn out to be stolen stock on the way to an illegal slaughterhouse. Matt steps up his campaign to undermine his wife's confidence. (thetvdb.com)