Eighty-two-year-old Rich Swanson, “Swanee,” knows that he’s a burden living with his daughter, so he decides to rent a room on his own, but instead finds himself 68 years in his past, but still at age 82 and uncertain about why or what he can do in the years of his childhood.
Of course! How had I missed it? If there was any reasonable point to all this. . .

Variants

(1)
  1. “The Window of Time” by Richard Matheson, Magazine of Fantasy and Science Fiction, September/October 2010.
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Richard Matheson