Check out this old episode of The Outer Limits and tell me if it doesn't remind you of the ending of a certain critically acclaimed superhero graphic novel. (Note: If you haven't read Watchmen, you may not want to watch this - it may spoil the ending for you.)
Interesting, eh? (I had actually never seen that episode before today, and particularly enjoyed the beautifully noirish cinematography of Conrad Hall.) Apparently, Alan Moore only noticed the resemblance after he had already came up with the ending. There's a reference to the episode in the last chapter of Watchmen in what Moore referred to as "a belated nod".