So Harold Saxon's behind the experiments. Hmmmm... Why does the Meddling Monk immediately jump to mind now?
My Martha love is rekindled - she was smart, able to think for herself and deserves her own sonic screwdriver. Very annoying mother already (and the running mother slapping the Doctor joke gets another airing :) ) Though with a brother and a sister for Martha, I strongly suspect one of them won't reach the end of the series alive.
Best line : "Shouldn't take that long to reverse the polarity. Must be out of practice." Hee! Though the "He's my plus one" line was a lovely reference back as well.
Definite Quatermass shout-outs with the Cathedral at the end. In several ways it was a classic running down the corridors episode, but that worked beautifully.
Excellent episode, and definitely back on form after the weak Dalek story.
And now we have to wait two weeks for the next episode. Stupid Eurovision Song Contest. Grrr....