Yeah, I'm not sure RTD's idea there is entirely right. I get every bit of what he intended with the look, but isn't the idea that this is a brilliant scientist who's handicapped and yet he still chooses to be ultimately evil? There's an incredible irony of an incapacitated individual still pushing his limited resources towards the destruction of reality. I love that idea and I only wish he'd reconsider, but think it's unlikely. As for the skit itself - its a skit, isn't it? Perfectly serviceable and a great taste of Tennant as the Doctor, who gave me some Whittaker vibes there? Although the Doctor calling himself a "brilliant woman" is a bit too narcissistic (but understandably, in the sense of the show recognizing Whittaker's contributions to the part). Yeah, he's still got it. But the "timelines are rupturing" line is telling. I've not read the comic, did that divulge anything? This is gonna tie to the Tales of the TARDIS, isn't it?