"Terra Nova" is the sixth episode (production #106) of the television series Star Trek: Enterprise, and was written by Brannon Braga and Rick Berman. LeVar Burton served as director for the episode. Enterprise learns the fate of a human colony not heard from for seventy years. When the crew arrives, they discover unexplained radiation at the site of the colony. Understanding that radiation levels seventy years ago would have been lethal, they find people still there and living underground. Plot Enterprise is investigating the first human deep-space colony — Terra Nova, nine years away from Earth at early warp speed. The colony had not been heard from in the last seventy years, following a disagreement with Earth regarding further colony ships. Captain Archer, Ensign Mayweather, Lieutenant Reed, and Sub-Commander T'Pol take a shuttlepod to the surface, where they find a ghost town and radiation that would have been lethal seventy years earlier. Reed then detects a humanoid and gives chase, arriving at a cave entrance — inside Archer and Reed make first contact, but Reed is soon shot and captured. Back on Enterprise, T'Pol reveals that the attackers were human, not alien. Archer notes fifty-two bio-signs in the cave network including Reed's. He decides to negotiate, and takes Doctor Phlox down to the surface. Two colonists, Jamin and Nadet, bring them to Reed, who is stable. Phlox also finds that Nadet, Jamin's mother, has lung cancer, and she is taken back to be cured. While being treated, T'Pol shows her records that the "poison rain" was caused by an asteroid strike that had sent radioactive ore up into the atmosphere and not by any treachery by Earth. Furthermore, the radiation stopped any distress calls from reaching Earth. Archer explains that Novans and humans are actually the same species. The adults had eventually died of radiation poisoning, but the young children had built up an immunity to it and had survived by fleeing underground. However, the radiation is beginning to contaminate their underground water sources, resulting in Nadet's cancer and threatening their lives. Archer and Phlox try to convince them to leave, since Phlox is unable to manufacture an antidote and it will be years before the radiation levels are safe again. Archer shows Nadet a photograph of a family group on a Terra Nova. She identifies them as human and says that the photo was taken before the poison rain;