Warren is currently Twittering a slew of Fake Doctor Who spoilers that give you a glimpse into what it might be like under his control. Wouldn't be family friendly any more, s'all I'm saying.
@SilentObjector — I recently re-watched River's intro, and watching the moment she was referring to made me tear up. And then I watched this episode... and teared up again.
1. Lovely touch to have W. Morgan Sheppard, Mark Sheppard's dad and a great genre stalwart, play the older version of his character.
2. There's a good bit of evidence that those new monsters, The Silents, have been foreshadowed a lot in previous Moffatt eps - possibly as far back as Silence (Silents?) In The Library, certainly in The Lodger.
@ Cat Vincent — As well as mentions of "Silence will fall" in "The Eleventh Hour," the Saturnynes saying that they saw "silence and the end of all things" through the cracks in time, and the Doctor making a comment about forgetting something "in the corner of his eye" in "The Eleventh Hour."
Still, I hadn't considered that one or more Silence could be in the TARDIS, and had been there for a while. How would be know? Innnnnnteresting.
Based on all this talk, I feel like I should be getting back into Dr Who. I was really put off by the... well, David Tennant's cartoon face mainly - if I want to appreciate it though, am I able to just drop in at the start of Matt Smith, or should I go a little earlier for some reason (or even a little later)?
If you accept the fact that shit went down before you got there, yes. For the most part, the fifth season was meant to be a new start for the series. I'd go back and watch Silence In The Library (season 4 somewhere) for reference, though; the current show-runner wrote that episode and he references it, and the one important recurring character from pre-Smith first appears there.
am I able to just drop in at the start of Matt Smith, or should I go a little earlier for some reason (or even a little later)?
You can do either/or, really. Smith's first episode involves properly demonstrating who the Doctor is and what he is here to do by careful positioning of the plot elements - one of his last lines in that ep. is in fact a small sentence that entirely defines what 'The Doctor' really means.