[Jimmy Dugan]

that is true. However, maybe he was doing so because he had to because it was part of the game that was being played on him. This is far fetched just throwing out some ideas. Also consider the scenerio that Dr.Gordan is still around. He could have been the one tho sewed the key into the eye on the man in part two, also he is the one supplying Amanda and Jigsaw with the tools and medicinde necessary to keep him alive. Why didn't they use him as a doctor instead of the lady in part 3? Because she was part of the game.