This is a list of recurring characters from the live-action science fiction television series Star Trek: Enterprise, which originally aired on UPN between 2001 and 2005. The television show takes place in the 22nd century of the Star Trek universe, and takes place on starship (NX-01 Enterprise) exploring space. Characters are ordered alphabetically by family name, and characters who played a significant recurring role in the series are listed here; the main cast is listed at List of Star Trek: Enterprise cast members.