The Enterprise reaches Terra Nova, the first planet in the deep space colonized by humans in the beginning of the human colonization in a project called "The Great Experience". Due to the long round trip of eighteen years, the explorers have been forgotten by Earth. The Enterprise scans Terra Nova and finds fifty-eight humans living in the underside. When Archer, T'Pol, Malcolm and Travis reach the planet, they are treated as if they were hostile aliens by the locals. However, they find that Nardet, the mother of the leader of the human mutants, has lung cancer, and they bring her to be treated in Enterprise. But Dr. Phlox finds that their water is contaminated by a poison rain. Captain Archer suggests the relocation by force in the non-contaminated south hemisphere of the planet, but T'Pol advises that this procedure would destroy the Novan's culture. However fate helps Archer to find a solution.
"Terra Nova" is the weakest episode of this series up to this moment, with a non-original. It is amazing the silly and quite stupid decision of Captain Archer, believing that he could bring a breed of mutants to Earth without thinking in the consequences of his unreasonable act. My vote is six.
Title (Brazil): "Terra Nova" ("New Land")