Troy's plan had precisely one step: talk to Kitty. As plans went, it was a little weak, but at least he had a starting point - in some of his dreams, he hadn't even a step one and he'd somehow managed to pull things off. Was he concerned? Not really. If he couldn't work it out himself, he and Liam would do it as a team.
...which was perhaps a little egotistical, but the other Doctor was actually a psychiatrist. They had as good a chance as anyone.
"Hello?" Troy called, before he finally spotted the figure in the tank. Oh! Perfect. Somewhat missing the she might hear you, but you can't hear her point, Troy went straight into mime: a big grin and a rapid wave. Yes. Hello.