- For other uses, see Fields.
In 2265, Fields was on duty in the hangar deck when he was contacted by Lieutenant Commander Spock and ordered to prepare the shuttlecraft Darwin for launch, so that a rescue party could be transported down to Delta Vega. (TOS - Crucible novel: The Fire and the Rose)
By 2266, Fields was assigned duty in the phaser control room, and was on duty when the Enterprise engaged the Romulan Vas Hatham-class bird-of-prey, ChR Gal Gath'thong. (TOS episode: "Balance of Terror")
Around stardate 2715, Fields reported a suspicious crewman on deck 14 when there was a ship-wide search for an escaped mental patient from Tantalus V, Simon Van Gelder. (TOS episode: "Dagger of the Mind")
Later in 2267, Fields was attached to the security division around the time that the Enterprise visited Miri's homeworld, when he served on Captain James T. Kirk's landing party to the planet's surface. (TOS episode: "Miri")