Star Trek: Enterprise (simply titled Enterprise prior to season three) is a science fiction television program created by Brannon Braga and Rick Berman set in the Star Trek universe created by Gene Roddenberry. The series follows the adventures of humanity's first Warp 5 starship, Enterprise, ten years before the United Federation of Planets shown in previous Star Trek incarnations was formed.

Enterprise premiered on September 26, 2001. The pilot episode, "Broken Bow", takes place in the year 2151, halfway between the 21st-century events shown in the movie Star Trek: First Contact and the original Star Trek television series.

Low ratings prompted UPN to cancel Star Trek: Enterprise on February 2, 2005, but the network allowed the series to complete its fourth season; the final episode aired on May 13, 2005. After a run of four seasons and 98 episodes, it was the first Star Trek series since the original Star Trek to have been cancelled by its network rather than finished by its producers. It is also the last series in an 18-year run of back-to-back new Star Trek shows beginning with Star Trek: The Next Generation in 1987.

In the early twenty-second century, the starship Enterprise is launched. Her mission is to explore strange new worlds, seek out new life and new civilizations and to boldly go where no humans have gone before. Along with an alien chief medical officer and first officer, this crew with only NASA-level training and what the Vulcans know of local space, begin to explore and begin the legacy set for other Enterprise crews and captains like Robert April, Christopher Pike, James Kirk, John Harriman, Rachel Garrett, Jean-Luc Picard, William Riker, Edward Jellico and others. Written by Lee Jamilkowski

It's the 22nd century. At the dawn of the United Federation of Planets, 100 years before the adventures of Captain Kirk and crew, Captain Jonathan Archer and the crew of the Starship Enterprise NX-01 begin the journey where no one has gone before. Written by Anonymous

The Xindi have attacked Earth. Seven million people are dead. They will attack again, and this time, they will destroy Earth... NX-01 has been recalled, her mission of exploration is over, now she is being sent into The Expanse, a deadly region of space, to find these Xindi... and destroy them before they can destroy Earth. Written by Anonymous

A prequel series, set 100 years before the original Star Trek series, which focuses on the early years of Starfleet, leading up to the formation of the Federation and the Earth-Romulan Wars. The series is set aboard the Earth ship Enterprise NX-01, captained by Jonathan Archer. Written by David Nisbet