Airs Tuesday, 18 Dec 2018 at 20:00 GMT on BBC One
Nicky's ethics are tested when an acquaintance from the past puts her in a difficult position, but with a patient's life at risk, will Nicky do the right thing?
With a little nudge from Hanssen, a struggling Sacha finally opens up to a loved one.
Dom and Lofty's trip doesn't get off to the best start.
With Christmas looming, Serena is forced to acknowledge what's really troubling her.
Meanwhile, it is Leah's last day at Holby.
