Turlough is a bit nutty, yes?

One of my projects for my new Abnormal Psychology class is to pick a character from Movie/TV/book, analyze what mental illnesses they could possibly have, then figure out whether that illness was presented factually. I had a few thoughts, then...TURLOUGH. Who could be a better case of mental instability? Homicidal, suicidal, repressed trauma involving giant prawn aliens...he's got it all.

Side note: I had a dream a few nights ago in which I was exploring some old city with Five.  We ran into some girl that was very hyper. I implied (with a somewhat rude gesture) that I was sleeping with him. She squeed and ran over to him to confirm, but he blushed and denied it. Apparently, I have a very odd subconscious.