As Christmas approaches, Mrs Hall’s world is rocked by bad news.
Meanwhile,Tristan is given a special wartime mission involving pigeons.

Each of the six couples will perform a festive fuelled routine in the hope of impressing the judges, Craig Revel Horwood, Motsi Mabuse, Anton Du Beke and Head Judge Shirley Ballas, and the voting studio audience. But who will emerge the Christmas star of the evening, and lift the sought after Christmas trophy?