High Quality Content by WIKIPEDIA articles! This is an episode list for the science fiction television series Star Trek: Enterprise (originally credited as simply "Enterprise"), which aired on UPN from September 2001 through May 2005. A prequel to the original Star Trek series, this is the fifth television program in the Star Trek franchise, and comprises a total of 98 episodes over the show`s four seasons. The series premiere, "Broken Bow" originally aired as a two-hour presentation, subsequently aired as a set of two one-hour episodes in rerun. The episodes are listed in chronological order by original air date, which match the episode order in each season`s DVD set.