While investigating the murder of a rich benefactor and the theft of children's presents at a Christmas charity pageant, Murdoch discovers suggestions that a Christmas monster, a Krampus, may be involved. A Merry Murdoch Christmas is the first stand-alone two hour Christmas special that aired on December 21, 2015 in Canada, and on December 20, 2015 in France.

Yannick Bisson
as Detective William Murdoch

Helene Joy
as Dr. Julia Ogden

Thomas Craig
as Inspector Thomas Brackenreid Sr.

Jonny Harris
as Constable George Crabtree

Lachlan Murdoch
as Constable Henry Higgins

Kristian Bruun
as Constable Jackson

Arwen Humphreys
as Margaret Brackenreid

Brendan Coyle
as Rankin

Kelly Rowan
as Millicent McGowan

Peyton Kennedy
as Mary Pickford