Plot hole: At 3:10, James Nathanson tells Jack to meet him in ten minutes, or Jack's lead to the nerve gas will disappear. When Jack arrives at the rendezvous point twenty minutes later, at 3:30, Nathanson is still waiting. Considering his dedication to the Sentox conspiracy and his determination to see their plan succeed, Nathanson isn't going to wait; when he says he's going to disappear in ten minutes, then he's going to disappear in ten minutes.