Actually, Shadow, I think you have a point. Lex Luthor got documented in the museum's history, but John Doe/Tempus didn't?
On second thought it does make sense: Lex Luthor was news. Lois & Clark were the only people aware of the events that occurred in Tempus Fugitive & the alternate universe, and "John Doe" got the public credit for the events in the third Tempus episode.
