- For other uses, see Christopher.
Brynner attended high school in the 1990s, during which time he had a Māori tribal pattern tattoo tattooed on his arm. He would later have it removed, as he felt the United States government and other business companies preferred those without anything too unusual. Brynner felt he had to be "just like the rest of the drones". (DS9 episode: "Past Tense, Part I")
In the 2000s, Brynner served as a lieutenant in the United States Army and saw action in Iraq during the Iraq War. It was during this period that he first met Flint. Brynner knew of Flint's status as an Immortal being and knew him through several of his aliases, including "Jerome Drexel". (ST short story: "The Immortality Blues")
In August 2024, Brynner encountered Jadzia Dax soon after she was sent backwards in time from 2371. He brought her to his apartment, where he helped her to locate Benjamin Sisko and Julian Bashir, who had been taken to a Sanctuary District. (DS9 episode: "Past Tense, Part I")
Several days later, Brynner allowed several Sanctuary residents to broadcast on his station, allowing the American public to see the true nature of the Sanctuary Districts. (DS9 episode: "Past Tense, Part II")
Brynner later established the Brynner Asteroid, a habitat on one of the fragments of the asteroid his company had helped to destroy in 2031. In 2058, the L-5 Colonies joined together in an attempt to create a stable subspace field. The test backfired, and Brynner and thousands of others disappeared. (TLE novel: The Sundered)
Although Brynner was presumed killed, he actually survived, as he was on Earth Station Bozeman at the time. On April 5, 2063, he joined Jerome Drexel in watching first contact between Humanity and an alien race in Bozeman, Montana. (ST short story: "The Immortality Blues")