"This Side of Paradise" is the twenty-fourth episode of the first season of the original science fiction television series, Star Trek. It was first broadcast on March 2, 1967, and was repeated on August 10, 1967. The episode was written by D.C. Fontana and Jerry Sohl (using the pseudonym Nathan Butler), and directed by Ralph Senensky. The title is taken from the poem "Tiare Tahiti" by Rupert Brooke. In this episode, the USS Enterprise visits a planet where the inhabitants are under the influence of strange plant life.