What’s that? You didn’t realize that Tim’s favorite childhood cartoon was part of the
Star Trek universe? And I suppose you also believe that Doc Brown had nothing to do with
Brownian motion?! According to the creator, this universe has a fixed time line in which you
may travel but not change things—what he calls “working paradoxes,” though my memory
holds only one time-travel episode, “Vows” (14 Sep 1995).
You may have prevented me from altering the past, but you failed too. You see I have
clear memories of your little inspirational about keeping my vows of love. I never forgot
it. Obviously history is immutable.