George Samuel Kirk
George Samuel "Sam" Kirk Jr. was a male Human scientist and Starfleet sciences division officer who lived during the mid-23rd century.

Biography 
George Samuel Kirk Jr. was the eldest son of George and Winona Kirk and the brother of famed Starfleet Captain James T. Kirk. 
Only his younger brother was said to call him by the nickname "Sam". () This was retconned, as he is only called "Sam" while on the Enterprise. (SNW)

By 2259, Kirk was married to Aurelan and they had three sons, including Peter. (; )

Starfleet career 
Kirk served as a Starfleet officer, like his father and brother, and had been promoted to the rank of lieutenant by 2259. 

On Stardate 2259.42, Kirk reported to the  as a member of the life sciences department under the command of Lieutenant Spock. ()

On Stardate 2912.4, Kirk was assigned to the landing party to the comet C/2260-Quentin to determine how to stop it from hitting the planet Persephone III. Kirk himself was injured but was transported back to the Enterprise with the landing party where he received proper medical attention. ()

By Stardate 1943.7, Kirk had recovered from his injuries. ()

On Stardate 2510.6, Kirk was involved in the landing party to investigate why the  had crash-landed on Valeo Beta V. He later attended the funeral of Chief engineer Hemmer. ()

Civilian career 
In 2265, Sam saw James off when the captain began a five-year mission of exploration in command of the Enterprise. Also saying farewell were Aurelan and their three sons. On this occasion, Sam mentioned that he wished to be transferred to the Earth Colony II research station. ()

The following year, Sam was working as a civilian research biologist living with his family on Deneva; his private transmitter was designated GSK 783. 

A short time later, vessels from Ingraham B arrived carrying flying parasites, and many of the colonists, including Sam, were attacked and infiltrated by the parasites. Resisting the parasites' control was excruciatingly painful, but in early 2267, eight months after the Ingraham B vessels arrived, Aurelan managed to break the long communication blackout and get a brief distress call out to the Enterprise. 

By the time the ship arrived, Sam was dead; his wife died soon after. Their son, Peter, lived and was ultimately freed of the parasites. ()

Alternate timelines and realities
In an alternate timeline, Sam, now a lieutenant commander, was still serving aboard the  in 2266 during the Neutral Zone Incursion. A time traveling Christopher Pike from 2259 consulted with Sam after learning that his brother was the captain of the . After James beamed aboard, he and Sam immediately shared a hug, warmly greeting each other. ()

Relationships

Family

James T. Kirk 
 
Sam was the brother of James T. Kirk and was the one who gave Sam his nickname. When James was given command of the USS Enterprise, he, along with his family, were present when James left on his five-year mission. (;)

According to an alternate timeline version of George Samuel Kirk, he described his brother as a "huge pain in the ass but he's a fine a captain as Starfleet has." ()

Friendships

Christopher Pike 

Kirk and Christopher Pike met sometime prior to 2259 and became friends. In fact, prior to the mission to Kiley 279, Pike personally wanted Kirk aboard the Enterprise as a crewmember. ()

During the briefing prior to his first away mission, Pike commented on liking Kirk's new mustache, prompting Kirk to suggest that Pike might want to try one on himself. ()

Key dates 
 2259: Appointed to the life sciences department aboard the USS Enterprise
 2265: Sees brother James T. Kirk off on his five-year mission
 2266: Moves to Deneva
 2267: Dies after being infected by a flying parasite

Appendices

Appearances 
 
 
 
 
 
 
  (alternate timeline)

Background information 
The corpse of George Samuel Kirk was portrayed by William Shatner in his only non-James T. Kirk role (possessed or otherwise). According to the script for "Operation -- Annihilate!", "Sam is revealed, very definitely a Kirk… older by ten years than the captain, perhaps a little different in nose or jawline… but he looks too much like Jim Kirk to be anyone but his brother." 

George Samuel Kirk was to appear in 's  (referred to in the film's script as "George Kirk, Jr." ), where he would have been played by Spencer Daniels. Scenes featuring Daniels as Sam Kirk were filmed, but the character was entirely cut from the final release. The one remaining scene of Daniels playing Sam Kirk, in which Jim Kirk called out to him as he was driving past him in their uncle's (in the final cut, their stepfather's) Corvette, was altered to change the name of Daniels' character to "", apparently a friend of Jim's.

George Samuel Kirk's deleted scene from 2009's Star Trek was available on ,  as well as the Blu-ray set Star Trek: The Compendium. In the scene, George ran away from home and his brother to escape the cruelty of their , finding it impossible to "be a Kirk" in Frank's household. He was also angered that Frank had claimed their late father's Corvette as his own. After George left, Jim found the keys to the Corvette and drove off in the car. As originally conceived, Jim drove by and called out to a shocked George, who had been trying to hitchhike.

George Samuel Kirk was portrayed by Dan Jeannotte in .

Apocrypha 
George Samuel Kirk appeared in the last chapter of   Last Full Measure, set in 2238, in which an elderly Trip's first visit to the Starfleet War Memorial coincided with that of young Sam and Jimmy Kirk, rendering the quiet reflection he had hoped for an impossibility. The scene established George's birthdate August 12, which was also when Federation Day was celebrated. However, according to "Echoes of Yesterday" in TOS Special 3, George's birthdate was September 7, 2229, and his death took place on April 13, 2267. ("Operation – Annihilate!" originally aired on April 13, 1967)

A slightly altered version of George's deleted scene from 2009's Star Trek was found in the film's novelization. Among the scene's changes made for the book was George's revelation that Frank (who in a merger of the script and film characters the boys' stepfather, not uncle) wanted Jim to wash the Corvette, which had belonged to their late father, because he intended to sell it behind their mother's back - it was after hearing this that the decision to steal the car was made.

The alternate reality George appeared in IDW Publishing's Star Trek: Ongoing comic series, exploring events of the original series in the alternate reality, which clarified that the boys lived with their uncle until George ran away to live with his grandfather. This later led to a rift between the brothers, James feeling that George had abandoned their mother. 

During their investigation of the neural parasites, Kirk and the crew discovered George living underground with his family to escape the influence of the parasites after their attack on the colony, with the Enterprise subsequently devising a means to banish the parasites and cure George's family, which here consisted only of his wife Aurelan and one son, . At the story's conclusion, George and his family return to the colony, with George complimenting his brother's success, a degree of reconciliation having been reached between the two of them.

His mirror universe  was mentioned as being a Terran Empire scientist in the short story "The Greater Good" contained in the anthology Shards and Shadows. In 2263, he was awarded the Zee-Magnees Prize for his work in precision frontal lobotomy. As he had no interest in a military career and his brother  had no interest in science unless he could manipulate it to make his life easier, neither brother had to worry about the other getting in the way of his career and having to be eliminated.

External links 
 
 

de:George Samuel Kirk
fr:George Samuel Kirk
Humans
Scientists
Starfleet sciences personnel
USS Enterprise (NCC-1701) personnel