Star Trek: Enterprise (titled simply Enterprise until the third episode of season three) is an American science fiction television series created by Rick Berman and Brannon Braga as a prequel to Star Trek: The Original Series. It originally aired from September 26, 2001 to May 13, 2005 on UPN, spanning 98 episodes across four seasons. Set in the 22nd century 100 years before the USS Enterprise's five-year mission, the series follows the adventures of the crew of the first Warp 5 capable Starfleet starship, Enterprise (registration NX-01), as they explore the galaxy. An ongoing storyline, referred to as the Temporal Cold War, continued through the third season, in which forces from the future attempted to manipulate events in the present. In the third season, an escalation of this campaign introduced the Xindi and dealt with the repercussions of their attack on Earth.
After being asked to produce a fifth Star Trek series by UPN, Braga and Berman sought to create a more basic and relatable series set after the 21st century events of the film Star Trek: First Contact. The episodes concentrated on a core trio of characters: Captain Jonathan Archer (played by Scott Bakula), Commander Charles "Trip" Tucker III (played by Connor Trinneer) and Sub-commander T'Pol (played by Jolene Blalock). It was filmed on the Paramount lot in Los Angeles, California, on the same stages that had housed the Star Trek series and films since the abandoned Star Trek: Phase II in the late 1970s. In addition to dropping the Star Trek prefix, Enterprise used the pop-influenced song "Where My Heart Will Take Me" (performed by Russell Watson) as its theme. Enterprise has elements of a straightforward prequel to the original Star Trek series, but it also had elements of a sequel to it. At the start of the second season, Braga said that the "Temporal Cold War" storyline would continue to be included if viewers were still interested, but later described it as "strangulating".