On Christmas Day 2015, Kat returns to Walford to spend Christmas with Stacey. Alfie follows with the boys. While at Mick's stag party, Alfie tells Ian and Phil that he may have a brain tumour. Ian and Phil go with him to a hospital appointment, where he learns that the tumour has stopped growing but he may need an operation if he begins showing symptoms. Alfie tells Kat about his tumour and in turn, Kat tells Alfie that she has a son living in Ireland. After Charlie dies from a heart attack, Kat and Alfie decide to search for her son. After saying their goodbyes, Kat and Alfie depart.