Kat's guilt over her one-night stand grows when Mark turns up at the Vic, intent on making their fling into a more permanent arrangement. It appears Kat and her regulars aren't too thrilled by that prospect. Syed's dilemma grows more serious when Amira refuses to change her mind about letting Christian see baby Yasmin, Ian tries to impress Mandy by getting a flashy new car, and Fat Boy feels hurt when he sees Tyler flirting with Whitney. He won't know himself by the end of the week.