Lieutenant Robert Tomlinson was a male Human Starfleet officer who lived during the mid-23rd century. He served in the command division aboard the USS Enterprise during the mid-2260s under the command of Captain James T. Kirk. He was one of the ship's phaser specialists and was assigned to the forward phaser control room.
In 2266, Tomlinson was engaged to be married to Angela Martine, a fellow Enterprise crewmember. The wedding ceremony was interrupted, however, when the Enterprise went to condition red upon news of a Romulan Bird-of-Prey attacking Outpost 4, necessitating all crewmembers reporting to battle stations.
As Tomlinson and Stiles were working at the controls, a phaser coolant leak incapacitated both of them in the midst of another Romulan attack. Although Lieutenant Commander Spock was able to pull them both from the phaser room, Tomlinson succumbed to his injuries and died, the only Enterprise casualty of the conflict. (TOS: "Balance of Terror")