Blue Alien Tech
Chatting with Laurel who must share some blame for encouraging me. ♥
So... the TARDIS really doesn't tell the Doctor things that maybe he'd wish she would, such as the presence of unexpected guests. I mean, she must be aware, but the Resident Time Lord doesn't get to partake in the information. Sounds a little like the relationship between a certain piece of Reach tech and its superhero buddy in regards to duel identities. Or something.