Another thing about Charlie living is that even if Jack had gotten his heart started again, the way he was beating on him(for what felt like five minutes), he would have caved in his chest, or at least broken most of his ribs.
Oh, as for Tery O'Quinn, he's mostly done TV(X-Files, West Wing, JAG, Earth 2), but a few movies as well. The first thing I saw him in was The Rocketeer, when he played Howard Hughes.