Fields was a male Human Starfleet enlisted crewmember in the 23rd century. He served aboard the USS Enterprise between 2266 and 2267 under the command of Captain James T. Kirk, during a historic five-year mission which the starship undertook.
In 2266, Fields was assigned to the forward phaser control room as a phaser specialist. When the Enterprise went to condition red upon news of a Romulan Bird-of-Prey attacking Outpost 4, all crewmembers reported to battle stations. Fields, along with Brenner, reported on the readiness of the weapon batteries. He was injured by radiation burns, when the Enterprise destroyed an atomic weapon, and reported to sickbay for treatment. (TOS: "Balance of Terror")
Background information Edit
The cast list written for the "Balance of Terror" referred to him as a crewman (in common with Brenner). Similarly, although not referenced on screen, Paul Schneider's script for "Balance of Terror" named this character (along with Brenner) as a "phaser specialist".