Yeah, but how do we know for sure that it was just a mistake? No one here knows anything beyond what we little Viveca is letting us in on.

[And she's completely on edge now with not knowing more than they do. She can't believe she was fine simply existing here and going on missions before without knowing more. She understands now what the Doctor had been trying to tell her shortly after his arrival. There's always a catch. ]

I never thought to question it till now. And never wondered -

[She hesitates, but goes to stand in close enough that she can sit beside him and whisper.]

What's the real purpose of our taking the orbs?