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Updated with new reviews on 22nd December.
But, other than that, Last Christmas is a hugely satisfying story and a cracking festive outing (certainly one of the best Doctor Who specials). The ending will have some in tears and others beaming with joy and excitement. I can’t imagine anything better for Christmas Day. 8/10Den of Geek
Last Christmas is really quite an ambitious Yuletide episode of Doctor Who. It's a notable step up from last year's, and it manages to pack together ongoing material, the elements for a standalone story, and no shortage of Christmas trimmings, Doctor Who style.Sci-Fi Bulletin
There are plenty of surprises as the episode progresses, and at least one major movie influence which hasn’t been mentioned yet (unsurprisingly, as it would give the central conceit away). It switches tone in a way we’ve not seen done with quite so much panache since the Russell T Davies era, and it’s a relief to say that it works well. 9/10Radio Times
One of the most pleasing things about Last Christmas is its compact, self-contained nature. It is complex in its own way but it restricts itself to a handful of supporting characters.Metro
Moffat has described the episode as being like Miracle on 34th Street meets Alien. However, its central concept is reminiscent of a more recent movie, as well as being another variant on that most traditional of Who tales: the base under siege.Mirror
Many people doze after their Christmas dinner but this episode should ensure sweet dreams for most Who fans.Doctor Who TV
While this seems like an episode that really shouldn’t work on paper when you look at the ingredients, it does somehow come together to form one of the best Christmas specials yet. 9/10Cult Box
Like all good Doctor Who stories, this juggles the mundane with the frivolous, the fantastical and the sci-fi – and also takes a moment or two to register just how much fun it’s having in the process. 4/5Warped Factor
Last Christmas is scary, exciting, emotional and ambitious. It will leave some weeping tears of Christmas joy, and others just weeping. It's one of the very best Christmas specials the show has given us over the last decade, and is the perfect closing chapter for series 8.Sole of Sci-Fi
There are scenes that are packed with emotion, without spilling over into gloopy sentimentality. The relationship between the Doctor and Clara is especially sweet with a wonderful pay-off.There Goes The Day
Not the greatest Christmas story ever told, nor the best Who outing (though definitely one of the better advent adventures for him), this does allow a somewhat more even keel from which to launch the next season. 4/5Watch this space for more reviews as we get closer to the special on Christmas Day at 6.15pm.