I finally got to read this, and it's fantastic! Everything that was good about EoT, times eleventy billion! I love how they actually got to connect properly, and the Doctor got the chance to save the Master, though I think by that point they were both saving each other. I wonder if the Doctor would still regenerate into Eleven, or how he would be different? I think you should write their adventures together as a sequel. *nodnod*
One question, though- perhaps I missed something, but why did Donna turn up when she did? Some sort of subliminal Time Lord homing sense, or was she just investigating alien things? Anyway, it was great that she actually got to do things! Also, you kept the bondage chair! <3 <3