• Warning: Spoilers
    Nothing particularly unique, fresh or new happens in The Grand, but it succeeds because it constantly surprises and turns expectations on their heads. Russell T Davies, that genius writer, is always good at catching the viewer out, and the show's greatest successes are delivered by deft overturning of what we think is going to happen next.

    Casting Susan Hampshire as a prostitute? Straightaway, that's brilliant. I expected the whole series to involve Miss Harkness at risk of being caught out, struggling to keep one step ahead of propriety ... but in Russell T Davies's hands, all of that is blown away. By episode three, her trade is an open secret. This is why RTD is one of Britain's most successful TV writers, and I am not.

    Series One thrives on the aspiring, go-getting maid Monica. Several gobsmacking twists on the trot lead Monica's story to an appalling conclusion: gang rape, murder in self defence, execution. Well done, Mr Davies.

    It all falls apart in series two. Head transplants are always tricky to pull off in ongoing TV series, but The Grand fails in giving two key characters head AND personality transplants. The impossibly handsome, tormented Stephen becomes ten years younger and infinitely wetter. Outspoken, bitter Ruth becomes a shivering, febrile mess. These two changes are a huge failing and, with the Bannerman family granny forgotten between series, and with John and Sarah Bannerman (the irreplaceable Julia St John) written out after a couple of episodes, major driving forces are lost. Series two is very different from series one, and much weaker. Sure, there are still great episodes (Monica's revenge, Clive's dilemma), but these individual story lines are divorced from the main ongoing stories.

    As is the way of these things, the Below Stairs characters are always the most interesting. While the Above Stairs characters worry about business deals and all of that old nonsense, there is a real sense that life below stairs is tough, cruel, bitter and horrible.

    The Grand, at its best, really is "grand". Cliché-busting, surprising, and full of memorable characters and situations. The problem with the majority of series two is that those memorable characters aren't quite as memorable as they used to be, which handicaps the story from the very beginning.