With Syed and Christian adamant their marriage is over, Lucy and Zainab plot to make them talk by locking them in the restaurant to thrash out their differences. Will it be enough to get them back together, or will Christian still board the plane to America? I think you know the answer to that one. Billy tries to make peace with Alexa and asks her to drop the case against Lola, who worries he may only have succeeded in making things worse, while Tanya delves into the root of her mother's problems - and is stunned by what she discovers. Secret sister alert.