"We can do the best we can to make sure that the Master doesn't win but seeing as most of the people seem to be under his influence, which I'm betting he has something for that, he just might." Caitlyn says not meaning to be Debby downer, but sometimes the situation called for it. She detested being so down about something. She knew that Jack was stronger now and would fight against whatever it was that psychopath was doing.
Rose was worried about the Master getting power as well, not wanting it to happen otherwise something could go horribly wrong. She held onto the Doctor's hand needing to be reassured of his presence and that he'd do everything in his power to stop the Master.