Barclay
Legacy Name: Barclay

In his early days aboard the Enterprise-D, he frequently displayed nervous behavior, demonstrated a noticeable lack of confidence, stammered frequently, was extremely introverted, and occasionally bumbled. These traits aroused the derision of some of his shipmates on the USS Enterprise-D – with some even going as far as calling him "Lieutenant Broccoli" behind his back or, on unfortunate occasions, to his face

Upon his transfer to the Enterprise-D in 2366, Barclay held the rank of lieutenant junior grade. Due to his nervousness and lack of confidence, many members of the Enterprise crew initially referred to him as "Lieutenant Broccoli", a play on the name Barclay, coined by Wesley Crusher. He was initially disliked by members of the crew, not only due to the fact he seemed constantly nervous and on edge, but also because he was routinely late for duty and often wound up on report for seemingly not performing to the best of his ability. As a result, he was the first member of the Enterprise crew to be given an 'unsatisfactory' rating in his evaluation. Riker and La Forge attempted to get him transferred off the ship, not believing he was competent enough to serve on the Federation flagship (with Riker even suggesting that Captain Gleason had exaggerated his assessment of Barclay to hasten the departure of a troublesome officer). Captain Picard, however, refused to simply transfer him away from the ship, and it was because of Picard's support and Geordi La Forge's encouragement (at Picard's behest) that Barclay's confidence began to increase. (TNG: "Hollow Pursuits")

During the first major Borg incursion into the Federation in late 2366, Barclay worked on repairs with Sherbourne after the Enterprise-D crew, in an unsuccessful attempt to destroy the Borg cube, emitted a burst of energy from their ship's deflector dish. (TNG: "The Best of Both Worlds, Part II")

As time passed, Barclay slowly grew in confidence and became one of La Forge's best engineers. Following an encounter with an alien probe in 2367, Barclay's IQ rose to somewhere between 1200 and 1450 as a result of a neurological enhancement he received from the probe. During the time, he possessed this enhanced intellect, Barclay was more confident, outgoing, and sure of himself – even arguing grand unified theories with a holographic representation of Albert Einstein on the holodeck. Barclay was able to use the holodeck to integrate his mind into the ship's computer, effectively taking complete control. Unknown to Barclay, the Cytherians (the creators of the probe) set this in motion so that he would bring the Enterprise-D to them, as this was their species' preferred method of investigating new races. All attempts to disconnect or dissuade him were unsuccessful, and he created a subspace distortion that brought the Enterprise-D to the Cytherians. After this encounter, Barclay was returned to his previous self, but he did retain a bit of the confidence and intelligence that the experience gave him. (TNG: "The Nth Degree")

In 2369, Barclay assisted Alexander Rozhenko with writing a holodeck program of Deadwood, South Dakota in the Ancient West. Barclay included a prostitute and brothel in the simulation (likely forgetting it was to be a child's program), which Lieutenant Worf did not appreciate for his son's sake. (TNG: "A Fistful of Datas")

Later that year, Barclay inadvertently released the holographic representation of Professor James Moriarty from his confines in the computer memory core of the Enterprise-D, while conducting a diagnosis of a failure of the holodeck matrix diodes, which turned out to have been caused by Moriarty himself. Upon activation, Moriarty briefly explained his history to Barclay and, realizing that over four years had passed, deduced that Captain Picard had merely promised to research a way for him to live in the real world in order to get him to release a hostage he had taken at the time. Barclay defended Picard, saying the captain would never go back on his word, and promised to report the incident to his superiors, which he did.

Barclay, Picard, and Data then reactivated the program to speak to Moriarty, who expressed his desire to leave the holodeck. Barclay proposed using transporter pattern enhancers to beam Moriarty off the hologrid and into the "real world." This idea, however, was a ruse by Moriarty to trick the three officers into giving him control of the ship by use of a holographic simulation of the Enterprise-D within the Sherlock Holmes program. The failure of the experiment led Data to discover the trickery, and on Captain Picard's suggestion he and Barclay managed to create a separate simulation within both programs, thereby fooling Moriarty with his own plan. Thinking he was free, Moriarty relinquished control of the Enterprise, allowing Barclay to store his program in an enhancement module, where Morirarty could safely explore the galaxy without causing any further trouble.

Barclay, along with the senior staff, later convened in the observation lounge to discuss recent events, and Captain Picard instructed him to keep the module safe. Picard also jokingly wondered if their reality "might be nothing more than an elaborate simulation being run inside a little device... sitting on someone else's table," which prompted Barclay, after the meeting had concluded, to test the idea by ordering the computer to "end program." Satisfied his life wasn't a simulation when nothing happened, he picked up the module and left as well. (TNG: "Ship in a Bottle")

The following year, Barclay had the dubious honor of becoming the eponymous person for a new illness, "Barclay's Protomorphosis Syndrome". He, in common with the rest of the crew, became affected when a treatment for the mild Urodelan flu provided by Doctor Beverly Crusher activated one of Barclay's recessive genes, causing him to mutate into a spider-like creature. It was due only to the efforts of Captain Picard and Lieutenant Commander Data that Barclay and the rest of the crew were saved; as Picard and Data were off the ship when the incident occurred, they were able to develop a retrovirus and release it using the ventilation systems. As Barclay was the first-known patient of the disorder, Dr. Crusher decided to name the newly discovered illness in his honor. (TNG: "Genesis")