Spock and the rest of the crew of the Enterprise transport a time-traveling criminal, Dr. Georges Mordreaux, between planets.
The effort required to change an event is proportional to the square of its distance in the past. The curve of a power function approaches infinity rather quickly.

Variants

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  1. Star Trek: The Entropy Effect by Vonda N. McIntyre (Pocket Books, June 1981).
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Vonda N. McIntyre