The Doctor nodded "Yeah I won't kil unless I have to. But with the Master, Id never kill him despite what hes done." He knew that he just couldn't . He was thinking for awhile. "Staring into the time vortex... it can drive time lords mad, but yet the drumming drives him mad. Not sure anything can be done about the drums." he knew it was probably more the MAsters own choices he needed to change.
Jack was looking around. "Mmmm yeah." he replied.