Memory Alpha
Memory Alpha

For others with the name, please see Perez (disambiguation).
"'Carbon-based units'?"
"Humans, Ensign Perez. Us.
– Perez answered by Leonard McCoy, 2270s (Star Trek: The Motion Picture)

Ensign Perez was a male Human Starfleet officer who lived during the mid-23rd century. He served in the operations division aboard the USS Enterprise under Captain James T. Kirk as one of the ship's security officers in mid-2270s.

During that time, he responded to an intruder alert in Ilia's quarters. During the conversation between Kirk, McCoy, and the Ilia probe, Perez inquired what was meant by the term "carbon unit." (Star Trek: The Motion Picture)

Perez was played by Joshua Gallegos and was credited simply as "security officer". In the shooting script for the film, this character was listed as security guard Ensign Lang.
The novel Ex Machina refers to this character as Joaquin Perez. Gene Roddenberry's novelization of Star Trek: The Motion Picture refers to him as "Chavez."

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