The opening shootout scene was unusually big and difficult to produce for an episodic TV show, but Davis Guggenheim was able to pull it off. At one point, Rob Morrow slipped and fell. Rather than stop the scene, he just started crawling as fast as he could along a wall. A short burst of that shot remained in the final cut and made it seem very real. The scene was shot at a courtyard outside an office building and is used in a lot of TV and movies. One movie was Collateral Damage with Arnold Schwarzennegger.