Santa Claus (Nick Frost) makes a grand entrance in a new trailer and clip from Doctor Who's highly-anticipated Christmas Special, airing Christmas Day on BBC One and BBC America. This obviously isn't your typical Kris Kringle, as he's seen riding a bucking Rudolph the Red-Nosed Reindeer before his first meeting with the Time Lord (Peter Capaldi). As we can see in the clip, Santa's elves come packing some serious artillery, and Rudolph even has his own unique security system.

In Doctor Who, the Doctor and Clara face their Last Christmas. Trapped on an Arctic base, under attack from terrifying creatures, who are you going to call? Santa Claus! Will this really be the Last Christmas for the Doctor and Clara? And what exactly are these terrifying creatures? It's not the first time the Doctor has visited the Arctic of course. It's previously been home to an Ice Warrior in Cold War - and the Cybermen! The episode will star Peter Capaldi, Jenna Coleman, Nick Frost, Michael Troughton and Nathan McMullen.

It still remains to be seen if this will, in fact, be Jenna Coleman's finale episode as the good Doctor's companion, Clara Oswald. Rumors have spread recently that she is departing from the series, although nothing has been made official by the BBC or the show's producers. Could we see the surprise debut of Doctor Who's new companion in the Christmas Special? We'll find out on December 25, but in the meantime, take a look at the trailer and clip below.

RELATED: Doctor Who Video Introduces Pearl Mackie as the New Companion