Originally Posted by Stevief86:
“I hope the master get's to make another appearance once M.S has settled down an established himself a bit more... I'd love to know what happened to him after he fought back Rassilon and once the Doctor realised that the drumming was real, he seemed to share an eerie connection with the master, just for a fleeting second. I get your point that a whole two eps of evil Doc could be a bit much, so maybe you could have him persuaded over to the dark side for a bit of the ep, only to be snapped out of it in the end, just in time for a spectacular finale.
Another thing that made my spine tingle was in the End Of Time when it looked like the Doctor would have to kill the Master to stop the Time lords. I'd love to see an ep where he has to make that decision and see it through and face the consequences. I wonder if he could kill his oldest friend?”
Yeah, that was an incredibly tense moment - was on the edge of my seat. My gut said he wouldn't do it but I was really starting to think he would. I think if he had done it, though, it would have been too far in those circumstances - the Tenth Doctor killing not only an unarmed man, but his oldest friend as the climax of his swansong is just too dark.
And I still think that he just wouldn't do it, even if it was more justifiable from a story point of view, and if he really, really had to, they would somehow sweeten the deal, ie. make the Master die willingly or resurrect him at the end.