Do we ever see him uncertain like that in the eps? (I know, we don't see this happening to him in the eps, but still...)

The only time I can think of is when Barry Martin in Rogue is shot by a third party at the end of the episode. Doyle, who is about to shoot him, is very dazed/shocked/disbelieving in what's just happened when he says I never shot him. It came from the ship.