This one is bad. I mean, irritatingly bad.
Somewhere between a mediocre episode of Sliders and a fifth-season Buffy episode, complete with TSTL plotlines, !!shocking!! alternate earths, and characters who can't seem to hold on to last season's growth arc once it becomes inconvenient to manhandling the plot in its arbitrarily predetermined direction.
Didn't Rose have this episode last season? Can she be housebroken? Apparently not. And Mickey and Xander are becoming less distinguishable with every passing moment. I was a Mickey Apologist last season, but...
I think Joss Whedon permanently broke my tolerance
Also. Ten years of a Time Lord's life? Ten years of a Time Lord's life???
At least there were no Vulcan mind-melds this episode.
Doctor Who 2006 episode 05, the rise of the cybermen