David Tennant is a Time Lorde

Her voice gave her away! I don´t know how Edward didn´t notice it xD

Definitely, and I even knew by her body shape! When I first saw her and they introduced her as James Kidd, I was like "Bullshit guys, that's a lady!" Then it wasn't so visible in the cutscenes, but when you were on a mission with her, you could totally see a differently built body because of her running and jumping style. How couldn't the pirates notice, I really don't understand :D