Love is in the air, but can Serena and Bernie overcome their issues? Dom fights for his relationship. Mo pushes Nicky to reach her full potential.

Christmas Day opens up old wounds for Fletch, while an explosive family secret is exposed. Meanwhile, a mysterious Santa walks the halls of Holby. Events cause Hanssen to doubt his suitability for CEO, but when the team are faced with saving an esteemed colleague's life will he change his mind? Christmas doesn't hold great memories for Xavier, but will an unlikely source encourage him to make happier ones?