That's one of the things I've wondered the couple times I've watch the last episode since it aired. While the argument with the new chief might have been Jack confused because he was drunk/high on whatever medicine he was taking, the pharmacist apparently believes him to be alive. Or they might just say (if they do say anything and he is dead) that it was a new person and not aware of his death. They wanted you to think it was a normal flashback (even if they did drop hints somewhat) until the end when you find out it was a flash of the future.Originally Posted by Larsa