Lieutenant Mark Latrelle was a Starfleet officer in 2151, and best friend of Lieutenant Malcolm Reed.

In that year, Reed's shipmate on Enterprise, Ensign Hoshi Sato, covertly contacted Latrelle to inquire about Reed's favorite food, for the purpose of planning a surprise birthday dinner for Reed. Latrelle recalled that he and Reed used to frequent a restaurant on the Embarcadero, but only because Reed had a crush on the waitress, Maureen, and that he was unaware of Reed's favorite food. (ENT: "Silent Enemy")

In the final draft script of "Silent Enemy", Mark Latrelle is described as being in his "late 20's." The character was played by John Rosenfeld.
Latrelle was scripted to be wearing "a different mission patch on his shoulder" than the equivalent patch for Enterprise. The assignment patch worn by Latrelle was, in reality, a NASA Mission Control emblem. It was provided by William Foster, a ground control officer at the Johnson Space Center. (Star Trek Encyclopedia (4th ed., vol. 1, p. 456)) It was not revealed which starship or facility this emblem belonged to and it was never seen again.
Community content is available under CC-BY-NC unless otherwise noted.