When Rosss girlfriend Kirsty (Ruth Westley) arrives, Marlon (Mark Charnock) perks up, especially as Ross seems pleased to see her. Over dinner Kirsty appears bored when Ross and Donna (Verity Rushworth) discuss work and Marlon worries that she isnt going to be the answer to his problems. His worries are later confirmed when Kirsty admits that her relationship with Ross is on the rocks. Is Marlon right to be worried about Donna being led astray?Over at Mill Cottage, the police arrive to tell Grayson (Christopher Villiers) that they've found Rosemarys blood on her handbag. When Grayson looks at Rosemarys diary entry from the day she disappeared and reads: MK-MF, he's worried when the police suggest MK could mean Matthew King (Matt Healy). Later, at Home Farm, the police arrive to question Matthew about where he was on the day Rosemary disappeared. Will Matthew be able to give a convincing alibi?Meanwhile, Perdy (Georgia Slowe) is delighted when Matthew tells her that he will wait for her and will love the baby as his own, but Grayson desperately wants to make the marriage work. Will she stand by her decision?