But while I liked Tasha Lem well enough, I could not help but imagine how much more resonant that part would have been if given to River Song: someone who, after all, had been engineered by the Church of the Silence and could easily have risen to its perverted spiritual head. Two lines of dialogue in particular – when Tasha reveals that she has found it easy to pilot the TARDIS, but never the Doctor, and when the Doctor reveals that she has been fighting the psychopath inside all her life – seemed tailor-made for River.

William Martin (via embracethetardis) [x] (via canyousonicme)