Merry Christmas Dr. Spiller

"Merry Christmas Dr. Spiller" is the 17th episode of Casualty and the 301st episode of the 15th series.

Synopsis
Holly has taken Patrick to a Christmas meal but is met with snide remarks and sarcasm from the ever moody registrar. On the way back to the department for their shifts, Patrick's car breaks down in the snow and the two medics are forced to seek shelter in a disused barn where more than a few secrets are going to be told.