How will Sharon react to the unexpected arrival?
When Sharon gets approached by Neil, whose daughter has been heartbroken by Zack, she covers for him. Asking Zack if this behaviour is all because of Nancy, Sharon encourages him to talk to her.
Later, when Neil confronts Zack, he pretends to be Martin. But as he tries to make up with Nancy, Neil enters asking if he's Martin and chaos ensues as mistaken identities leave both Zack and Martin in sticky situations.
To cheer them both up, Sharon offers to take Zack and Martin out but when they return home, there's a surprise on their doorstep that shocks them to their core. There's a one-year-old baby on the doorstep with a note which reads "Alyssa is yours, please take care of her".
EastEnders continues Mondays, Tuesdays, Thursdays and Fridays on BBC One