Jane / John / The Unmarried Mother 52m17s (Uttered to the bartender while the song I'm My Own Grandpa plays in the background.) John So how far can you travel, then? Temporal Agent Travel beyond 53 years of zero point, either direction, will result in the temporal wake disintegrating. John Zero point? Temporal Agent The invention of time travel. Temporal Agent / Bartender I've changed so much that I doubt my own mother would recognize me.