Lieutenant Bobby was a male Human Starfleet officer in the 23rd century. He served aboard the USS Enterprise from 2266 to 2267 under the command of Captain James T. Kirk, during the historic five-year mission. He served as a maintenance technician, security guard, and transporter chief.
Bobby was frequently seen working as a repair technician, responding to battle damage and normal maintenance requests. (TOS: "The Corbomite Maneuver", "Mudd's Women", "The Man Trap")
Following the death of Alfa 177 canine, Dr. Leonard McCoy covered the animal in a blanket and handed it to Bobby and requested an "autopsy in depth". (TOS: "The Enemy Within")
According to the final draft of the script, this character was described as an orderly, though wearing a operations division jumpsuit.
He served also served as the transporter chief during the Enterprise's rendezvous with the Antares. (TOS: "Charlie X")
He later served as member of the ship's security.
He and a sciences technician were chased in the ship's corridor by a rapier-wielding Lieutenant Sulu, who was under the influence of the Psi 2000 virus. Following the incident, he was among the guards who entered the engineering control room to apprehend the polywater intoxicated Kevin Riley, who had taken control of the ship through that station. (TOS: "The Naked Time")
When the Enterprise was thrown back in time to 1969, Bobby was attacked by United States Air Force Captain John Christopher, who stole his phaser. (TOS: "Tomorrow is Yesterday", "Operation -- Annihilate!")
Bobby also wore a sciences division jumpsuit, serving as a medical assistant at the bedside of Khan Noonien Singh. (TOS: "Space Seed")
Bobby was played by an unknown actor who also played Klingon guard in "Errand of Mercy". The same actor also appeared in a
Twilight Zone episode, "The Obsolete Man."
A post on Reddit.com stated that he was actually David Lee Ingram, (born 7 December 1941 in Los Angeles, CA and died on 25 July 2012) and was never credited because he never had a SAG