"Terra Prime" is the 21st episode of the fourth season of the American science fiction television series Star Trek: Enterprise, and originally aired on May 13, 2005. The story was developed by Judith and Garfield Reeves-Stevens, along with André Bormanis, and developed into a script by the Reeves-Stevenses and show runner Manny Coto. The episode is the second of a two-part story, which started in "Demons".