Sometimes the Doctor Who Christmas specials are rather bittersweet, or over-heavy for the festive season. We only just watched the 2011 special, `The Doctor, the Widow and the Wardrobe', and as far as I'm concerned, this is exactly what a Christmas special should be like. There's a Christmas surprise, some amazing visual effects, a large nod to CS Lewis and Narnia (not just a snow-covered planet but a line quoted from the book). There's some humour, there are some unusual aliens, and, best of all there's a wonderful climax and a great ending.
Matt Smith is superb as a slightly weird caretaker, Maurice Cole and Holly Earl excellent as the geeky Cyril and the teenage Lily (who looked very like the Narnian Lucy at times) - and Claire Skinner was absolutely fabulous as their mother.
Sure it's a bit twee, and there's not a whole lot of suspense or threat... but I loved it.
Sadly the only `extras' on the DVD are various compilations of `best of' moments in the previous series, presumably intended to inspire viewers to buy more DVDs.