The 1967 Star Trek episode The City on the Edge of Forever describes the effects of this action, which prompts a difficult decision to allow a car accident to
happen. In the movie The Final Countdown, the captain and officers of the U.S.S. Nimitz try to affect the outcome of the Pearl Harbor attack with this action, but are unsuccessful. The Michael Crichton book Timeline sees the protagonists do this action in medieval France during a castle siege. For 10 points, name this action that happens in every episode of the hit TV show Timeless.
a) Time travel
b) Assassination
c) Invention
d) Diplomacy