Sharon is angry with Jack for revealing her addiction (to Derek of all people), while Derek takes it upon himself to assume the best man duties again - something that doesn't go down too well with Tanya. Alfie is puzzled when Kat goes Christmas shopping without her purse, adding yet more fuel to his fire - and despite Michael's advice to stop torturing himself, the Vic landlord knows something is not right with his wife. Abi tries to heal the rift between Cora and her mum - but just as her grandmother begins to open up to her, she is shocked by the arrival of a familiar face.