Jacqueline "Jack" Sloane is a former Forensic Psychologist with NCIS and also a former member of the NCIS Major Case Response Team led by NCIS Special Agent Leroy Jethro Gibbs.
In March 2021, she resigned from both NCIS and the team to go reside in Afghanistan with the intention of continuing the work her murdered friend, Darya had started.
She is also the mother of Faith Tolliver.
Born in an unknown State, not much is known about Sloane's parents or if she has or had siblings.
After graduating from high school, she attended an unknown college, studying presumably psychology.
However, when she was nineteen years old, Sloane got drunk at a party with a friend, Rick Martel taking advantage of it and raping her with Sloane becoming pregnant.
Upon giving birth to her daughter whom she named Faith, Sloane chose to put up the newborn for adoption. She did this to protect Faith from Rick.
Some time after that, Sloane enlisted in the United States Army, reaching the rank of Lieutenant. She was presumably posted to diferent locations.
She was later assigned to a unit called "Wingos" or "Mighty Wingos" with the members being Samuel King, Ray Hale and Safwan Anshiri. The unit went on various missions together, Sloane forming a strong friendship with King, Hale and Safwan.
However, while on a mission in Afghanistan in August 2002, the unit was captured by a terrorist, Masahun who had presumably already kidnapped Marine Captain Chester Kelb.
For the next nine months, the group was imprisoned with Sloane being the lone target of Masahun's wrath because she was a woman. She went through extensive torture due to Masahun believing she and the Wingos possessed intel he and his men could use but when this lead nowhere, he got bored pretty fast. One of his torture tactics was to tie Sloane to a post before repeatedly whipping her, a move that would leave Sloane's back permanently scarred.
However, instead of giving up, Masahun later decided to play a new game. He would regularly have Sloane decide which of her comrades was going to die with the three assuring Sloane it would be alright despite Sloane refusing to play along.
Eventually, with King, Hale and Safwan all dead, Sloane was the only survivor of the Wingos.
On May 3, 2003, a unit composed of Marines as well as NCIS Special Agent Leon Vance stormed the area where Sloane and her group were being held. Having originally been given orders to rescue Kelb, the unit also rescued Sloane with Vance helping her get to safety. Even though all the other terrorists died, Masahun escaped and it was presumed that he had died in a drone strike.
Even though Sloane made a full physical recovery, she was emotionally, mentally and psychologically damaged. She developed survivor's guilt over the deaths of her fellow officers and began blaming herself for what had happened.
Her anger eventually emerged with Sloane regularly getting into trouble with two incidents being a bar fight in Texas and a road rage incident in Encinitas.
After being discharged from the Army, Sloane presumably began studying for a degree for psychology and eventually graduated. She joined NCIS with many of her postings unknown.
She soon became a Forensic Psychologist in California with Sloane receiving a six-month anger management course while in San Diego.
Some time prior to "Skeleton Crew", she reunited with Vance who had since become NCIS Director. Vance offered her a post at the main NCIS Headquarters in Washington D.C. with Sloane accepting.
NCIS Season 15
NCIS Season 16
NCIS Season 17
NCIS Season 18
For a more detailed list, see Jacqueline Sloane/List of Appearances.