Baker, the real madman with a box.

The way he gets tense (and probably sow the seeds for the 12th dense style) is amazing to watch and soon show us what is at stake. Sarah, dressing as Victoria, looks wonderful and extremely active as a character. Sutak, ah... the Doctor had to out clever him, but in the end he did show that a slightly unhinged Time Lord (and ah, the first mention of the name "Gallifrey") can defeat a mad god.