EastEnders - Kat Moon will return to Walford on Christmas Day, but her surprise arrival will immediately arouse suspicion.

Stacey Branning will be surprised when Kat turns up out of the blue, revealing that Alfie and the children are still in Spain.

However, Kat receives a shock of her own when Alfie later arrives and demands to know why she just left without a word.

As Alfie attempts to get to the bottom of what is going on with Kat, he eventually comes to a decision about their future, but what will it be? And why did Kat leave Spain?

Airs Christmas Day