I really did feel sorry for Carla. She was outstanding all the way through. But she did look almost wiped-out on her last exercise.
Of the two finishers, I did like James, but not so much Chris who clearly still had a lot of anger. But I suppose what the DS were looking for was that anger that could be used in a real-life dangerous situation.
I had watched some time ago a BBC(?) documentary series that interviewed some ex-SAS people, and made a note of what one of them said:
"You have to have control. But when it’s necessary, and only when it’s necessary, act with extreme violence, professionally."
I'm not sure Carla, despite all her strength and determination, could do that; but Chris possibly could.