See Brennan for other articles with titles that contain, either by relationship or by coincidence, this character's surname.

Marcus Brennan was a Starfleet career officer, a Human man serving in the late 24th century.

By the 2370s decade, Brennan had achieved the rank of captain and was the commanding officer of the USS Sentinel during the Hur'q crisis. He was killed in action in that year, 2378. (ST video game: Invasion)

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