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