In the “Reincarnation” episode of Futurama, they broke the episode up into three segments, each of which used a different style. The first one was in an old-fashioned Max Fleischer style and the main ...
In S7E3 "Decision 3012", a man from the future travels back in time to stop Nixon winning the election. Since he defeats Nixon, there is no need for him to return to his own time. He never does and ...