I told you I'm ready to start that fake Lenny Henry rumor any time--!
Seriously, I absolutely LOVE how Russell T. Davies and the rest of the "Doctor Who" producers and creators (and the BBC?) have brought in this diverse universe; I don't think there's any longtime Doctor Who fan of color who hasn't cracked about how no matter what planet they're on or what time they're in, The Doctor usually comes across aliens and villains and victims who are other white British males--or those who sound like them, at the very least. I know a large part of that is simply because that's where it was created, that's where it's filmed, etc. But we've all noticed. And that's their own fiction, because that's never represented *all* that the UK has to offer in the way of its own people and especially its own artists and performers.
No, it isn't the 1960s anymore, with the TV network telling Gene Roddenberry that he can't make Nichelle Nichols's Uhura such a central character in "Star Trek" (which was how the character was originally envisioned, and not relegated to saying "Hailing frequencies open, captain" every other line). There are blacks, Asians, and Indians and others who have been here all the time for science fiction, and why should we always be depicted in minor roles (or not at all)? If it makes some members of the audience "uncomfortable," then that's their problem. The social mores (and financial fears) of the previous time did allow such a perversion and misinterpretation that allowed the appearance and persistence of a myth of an all-white science fiction universe. Didn't those "uncomfortable" audience members hear that there was a social revolution? Today's society very much commands something different. Bravo, Martha; you've been a long time coming! If only Octavia Butler had lived to see you in action--!