1. Superman, You're Dead...Dead...Dead! - While trying to stop an experimental power plant disaster, Superman is transported to the distant future - a future where he has already died 3 times over! There, he discovers historic figures such as Custer, Lincoln and Washington, all of whom were transported just before their historical deaths. All these figures are being used as exhibits in an advanced history class in the future. Superman is shown records of history as viewed by the future civilization, and discovers that twice in the past he was about to die, but each time the scientists of the day produced a copy of him to replace the one that died. He is the third version of Superman, but due to instability of the protoplasm used to created him, when he dies he cannot be replaced.