Alfie is still plagued with doubts of Kat's infidelity and, in an attempt to push them aside, he pulls out all the stops to turn the Queen Vic and Albert Square into a Christmas extravaganza. Derek becomes the fall guy for Max as they try and protect his secret - but can the pair continue to meet 'their' demands? Bianca takes her frustrations out on Lola as she worries about her finances over Christmas, and Zainab is thrown by the arrival of an unexpected guest.