Eckels - Man that decides to go on a hunting trip to the past Keith - President of the current reality
Deutscher - Man that lost current presidency to Keith, known as the anti everything man in the current reality Mr. Travis - The safari guide in to the past
Lesperance - the assistant safari guide to the past
Eckels remarks how lucky they are that Deutscher lost to Keith because it would have dictatorship Travis explains to Eckels that even a small thing like killing a mouse could change their future because that mouse might have been the food for something else that would eventually have been the food for an early human, that now dies because there is not food available Eckels ask if the expedition was succesfull since Travis told him he had to go back in time to mark the target; Travis explains time does not allow paradoxes to happen and thus he would not be able to meet himself to see if the hunt went well Eckels gets scared when he sees the T-Rex; He steps off the path on accident Travis explains again that they cannot leave anything behind because it could change the future; Travis makes Eckels get the bullets from the T-Rex out of anger The sign in the future for the Time Safari has changed; Eckels says he stepped on a butterfly when before he said it was only dirt Travis shoots Eckels because he finds out that time is not only changed but Deutscher is now president OTHER NOTES:
Eckels wants to travel to the past because no one has been there; He says he will be the envy for other hunters The dangers of time travel comes in that even a small change can effect the future in the long term, a small breeze that has its course changed from someone new there may not blow a seed that would pollinate to be a tree for the some food, etc etc.. The hunters try to shoot only dinosaurs that will die shortly...