The episode starts with a scene on the Powell Estate where Rose and the Doctor are saying goodbye to Jackie and Mickey. This would not be important, but it shows that the programme is still "grounded" in every day life. Although we may be visiting the year 5,000,000,000,023, where the grass smells of apples and the people fly about on hover cars, we don't forget that we have just left a very real council estate, where people have very real concerns about whether the washing is done, who will cook the chips and beans, and of course, where their teenage daughter is. This makes us care more about the characters, they are real people, not elements from a computer game or characters generated by the roll of dice. Mickey also elicits some sympathy as his "I love you" isn't reciprocated by Rose.
The theme music used is the re-vamped Christmas Invasion version, with its added orchestral parts and brief sound effects at the beginning. This therefore, must be David Tennant's version of the theme music. The CGI and/or model work (you can't tell what's what these days) is astonishing, whether it is the futuristic city of New New York, or the thousands of 'Tomb of The Cybermen'-like chambers, the perspective, lighting, and focus is all rendered perfectly. We can become blasй about effects we've seen before - We know they can 'do' Cassandra, so when we see her now we aren't gazing in wonder at the effect, we're listening to what she say, but it's still well done, however they do it. I had wondered whether she would have survived in a different form, having been left with just a brain at the end of her last appearance, but even though this might make logical sense, it is dramatically much better for us to see the "bitchy trampoline", so that we (and especially younger viewers) can realise that this is the same character returning.
The shape of this season seems similar to the last, if, that is, we take The Christmas Invasion as the first episode of the new series. If That was the debut episode, full of fast thrills and excitement, and then this is the comedy counterpart of the End Of The World, complete with two returning characters. The following episode is the historical story, etc., etc. But on to the returning characters. It is reassuring to see The Face Of Boe make another appearance, given how much he was spoken about in the last series, much anticipation has been built up. Here he is voiced by Chandler & Co.'s Struan Rodger (he played Barbara Flynn's husband) and he lends a dignified, unpretentious gravitas to the part. He has a final secret which he won't reveal until he and the Doctor meet for the third and last time. I only hope that that next time we see a bit more of him, because he's a great character and well-realised by both the actor and Neill Gorton's visual effect. The other 'plus' this gives the story is that there is an unanswered question; a Bad Wolf-style mini story arc, likely to run through the series. Like the inclusion of Cassandra, and the fact that the story follows on from The End Of The World, this rewards loyal viewers, but is not intrusive as to deter casual viewers (they may even be tempted into watching further episodes to find out the Face's secret).
David Tennant and Billie Piper both perform well, with the latter having a lot of comedy work to do, especially in the scenes where she is playing Cassandra. At times, the comedy and innuendo gets a little out of control, and this is perhaps evidence of a very confident production team. This undermines the realism in a couple of areas, mainly to do with the mind-transfer machine. A staple of science-fiction (having been used in Doctor Who several times before, but to better effect in The Prisoner), mind transfer machines are sometimes used as an excuse for actors to give OTT performances, and David Tennant probably oversteps the mark here. Tennant is his jolly self throughout most of the story, but does get a small chunk of steely moralising near the end of the episode, showing that his character probably has more dimensions than we have seen so far. He seems more mercurial than the ninth Doctor, and the fact that we have lost such a great Doctor as Christopher Eccleston makes it even more remarkable that Tennant has succeeded so well in stepping into his shoes. As for the supporting characters, Zoл Wannamaker makes the most of her limited screen time, even appearing as a beautiful, younger Cassandra in a couple of sequences, and I hope we see her again in whatever form. Her acolyte, Chip, is played with imagination by Sean Gallagher and again it would be a shame if we don't see him again. The cat nuns' facial expressions are all but hidden by their masks, but they have some good vocal performances, with Brothers and Sisters' Dona Croll appropriately playing a sister!
The cat nuns were very well realised. When you compare the effort that went into making them with the equal effort that went into 1989's cheetah people, and then see how much better 2006's results are, it gives a good if a of how technology has marched on in the last 17 years. If, presumably, they are a race of people and only some of them work as nuns/nurses, then it would be nice to see more of them in future stories. They were especially popular with my four year old, who was a little sad when the "naughty cat" fell down the lift shaft! That brings me to the most shocking aspect of this story; the make-up design used for the various visible ailments on the 'human guinea pigs' was almost unnecessarily realistic and I know older children (and adults!) who were also a bit distressed by this. That said, at least it was convincing, and when the visible skin complaints were seen to be healed, this acted as a reassurance to younger viewers. Having said that, I am not sure exactly how the medicines would have healed scarred skins so quickly, and why did just eight bags of coloured liquids cure thousands of disease when they're supposed to be taken intravenously anyway? But I digress and I nitpick. This was a great 'funny episode', and Doctor Who has to be able to laugh occasionally (nobody likes a sci-fi series which takes itself too seriously). And despite the comedy, there were serious moments, and quite a touching ending (which I won't reveal!). Altogether, this gets eight out of ten, and I can't wait for next Saturday to come round!