Isn't it interesting that what we perceive as reality is actually only what our mind processes and sends us to act upon? In the story, Time and Time Again, Dr. Al Hart, a professor and university administrator, is living two realities at the same time; one life he accepts as real, but the other, equally realistic, exists in a different time and place. In the life he accepts as real, he finds himself an invalid unable to speak and barely able to move in an Alzheimer's assisted-living facility, wondering how he got there, and if the events he recalls from his job as a university administrator caused a stroke or pushed him into madness. He remembers everything about his life up to the point of entering the 'geezer garage' (as he calls this assisted-living facility), but nothing of his "other" life except what he reads. In the other life he is a whole and active man who finds himself, with his dog, lost in a new time and place dealing with the consequences following a long past nuclear disaster and the earth's first contact with a superior alien intelligence. Dr. Hart types his unread story on a personal computer in the 'geezer garage', alternating chapters between each life, but even in his mind the question remains; is either life actually real?