"Bound" is the seventeenth episode of the fourth season of the American science fiction television series Star Trek: Enterprise, originally broadcast on April 15, 2005. It was written by showrunner Manny Coto, and directed by Allan Kroeker. The episode featured the return of the Orion slave girls, which had been originally seen in the original pilot of Star Trek: The Original Series, "The Cage".

Set in the 22nd century, the series follows the adventures of the first Starfleet starship Enterprise, registration NX-01. In this episode, three Orion slave girls come on board the ship, and the crew, with the exception of Commander "Trip" Tucker and Commander T'Pol who seem to have a resistant psychic bond, begin acting strangely.

The episode featured the return of Cyia Batten and William Lucking who had both previously appeared in multi-episode parts in Star Trek: Deep Space Nine. Four time MTV Music Video Award for Choreography winner Travis Payne was brought on board to oversee the extensive choreography for the three actresses playing the Orion women. Each actress went through a four to five-hour make-up process for each day of filming, which required them to be sprayed green. "Bound" received Nielsen ratings of 1.8/3%, and critical reaction was mixed with one reviewer listing it amongst the best episodes of Enterprise while another listed as the worst episode ever of any Star Trek series.

Enterprise is en route to the Berengarius system, one of the proposed locations for a Starfleet starbase, when it is approached by an Orion Syndicate vessel. Captain Archer is invited to visit the Orion ship by its captain, Harrad-Sar. During the visit, Archer and Lieutenant Reed are entertained by three Orion dancers, Navaar, D'Nesh, and Maras. Archer negotiates with Harrad-Sar and they agree to a joint magnesite mining operation, and at Harrad-Sar's insistence the three slaves are given to him. They return to Enterprise with the slaves and set a course to survey the planet.

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