Mason was a Human child who lived aboard the USS Enterprise-D in 2364. He was the son of serving Starfleet officers.

That year, Mason was one of several Enterprise-D children kidnapped by the Aldeans in an effort to repopulate their planet. At the time of his kidnapping he was walking with his parents down a corridor. He later participated in Wesley Crusher's attempt at passive resistance. (TNG: "When The Bough Breaks")

Mason was portrayed by Wil Wheaton's younger brother Jeremy Wheaton
According to the episode's script, he was nine years old in 2364, placing his birth in 2355.
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