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.
At some point in time, she gave birth to a daughter, Faith Tolliver, whom she gave up for adoption. She was a Forensic Psychologist in California. She was also the sole survivor of a group of POWs captured in Afghanistan. She was tortured by a man she called The Monster, who she believed to be killed in a drone strike. This man is later revealed to be alive and using the name Nigel Hakim, posing as a British humanitarian.
NCIS Season 15
Sloane is introduced in "Skeleton Crew (NCIS episode)", where she appeared at Gibbs's door in the middle of the night, during Hurricane Molly. She wanted to use his phone as her car broke down and her cell was dead.
Sloane's history as a POW is revealed in "Handle with Care," when she is faced with a victim who shares her experiences.
NCIS Season 16
During season 16, Sloane and Gibbs grow closer and their chemistry increases, to the point where they both know things about one another that nobody else knows.
It is also revealed in this season that Sloane has a daughter, Faith Tolliver, who works as a doctor in a navy hospital. Sloane gave her up for adoption the day she was born, and Faith makes it clear that she doesn't want to get to know Sloane when they meet for the first time on a case.
NCIS Season 17
In Season 17 Episode 18 it is revealed that her daughter Faith was the result of rape.
NCIS Season 18
Prior to joining NCIS, she was in the Army. At the time she was captured in Afghanistan, her rank was Lieutenant.
Jack has a very caring and open personality, as she is always dedicated to helping others. She is always open to conversation, per her profession. She keeps many things private but tells her co-workers many things about herself. One thing is that she gave birth to a daughter, Faith Tolliver, and that Faith doesn't want to get to know her.
As a result of being held captive for nine months in Afghanistan when she was a POW, she has multiple scars on her back.
She can profile anyone, and she may deny this but she profiles her friends in her spare time. She can fight extremely well considering all of what she’s been through.
For a more detailed list, see Jacqueline Sloane/List of Appearances.