He could sense something was going on with Gabriel. Did he know? Could he see more than he let on? He was having more and more trouble acting as though he was the person he had inhabited. Their friend, this Robin. Cas had almost caught on for a moment or two there. Had seemed to figure him out. But he'd managed to reassure him that he was this Robin, and not William Murdoch, First Officer. But then this was a stubborn one. As choices go, it was a good one. Lots of power here. But he kept trying to fix things. Kept trying to tell them, and stop them. He had to act quickly.
"Gabriel will always be here to ask. Who knows how long the ship will be." And if that wasn't a winning argument, what was? He had her now, he was sure of it. Forget the angel, he'd deal with him later.
As he walked further down the hall, and got to the doorway, ready to enter the captains cabin, his hand, or more accurately Robins hand, shot out, grabbing the door frame so suddenly he had to stop so he didn't jerk forward ridiculously. Making a fist, he lowered it to his side again. He really had to act quickly.