Not a bad episode overall. A solar storm disrupts a military-backed cloning operation on an island somewhere in the UK. The storm also washes up the Doctor just as all the clones are breaking free of their human controllers.
The clones are known as ‘gangers’ (as in doppelgangers). There are lots of chases along shadowy corridors and so forth. There’s a fairly obvious moral dilemma around the gangers right to life v. the gangers’ wanting to take over the families of their human originals, etc.
The one poorly done bit of the episode comes when the Doctor is just about to negotiate peace between the two sides and one of the more gung-ho humans kills a ganger… thus triggering all hell breaking lose. It’s just not very credible or sensible… but it’s forgivable since the rest of the episode pretty much works.
Once again, Amy is largely excess to requirements… but Rory comes into his own a bit as he’s the most empathic of the humans and sides with a female ganger, of whom Amy gets a mite jealous. It’s an amusing side-story.
Matt Smith’s performance isn’t too bad – as he’s allowed to do a bit of acting this time. And the cliff-hanger’s interesting enough, what with this being the first of a two-parter. A strong 8/10 from me.