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Adm. Mark Jameson is a fictional character portrayed by Clayton Rohner in the TV series Star Trek: The Next Generation.
In the first episode they appeared in, titled Too Short a Season (season 1), they were 30 years old.
They appear in 1 episodes out of a total of 176 aired

Adm. Mark Jameson

by Clayton Rohner

character

Episodes1

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    Too Short a Season
    episode S1.E15 february 1988
    The Enterprise transports an elderly Starfleet Admiral to negotiate a hostage crisis. When the Admiral takes a de-aging drug, he endangers both his life and the mission.