The past Gibbs left behind
15 episodes of NCIS carry this thread, 15h 6m in all — 4 of them are in The Essentials.
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In airing order
The NCIS is distressed when Gibbs is injured in a terrorist explosion while on assignment in part one of a two part third season finale.
While Gibbs recovers from an injury caused by a bomb explosion, he experiences temporary memory loss, while his team tries to stop a terrorist group from carrying out a devastating attack on the Navy.
When Gibbs agrees to help the childhood friend of his daughter, who died 15 years ago, he finds himself at the center of an emotional and soul searching journey into his past, which leads to a shocking and heart-stopping conclusion.
After two Marines are ambushed, the NCIS team finds the investigation leads back to Gibbs' hometown, where secrets about his past are revealed.
Murder investigation prompts Gibbs and the team to play family counselor to his former mentor, Mike Franks, in the hopes of preventing a bloody international conflict.
Secrets arise when Gibbs' former mother-in-law surfaces as a witness in a murder investigation.
The team tries to track down a serial killer, while Abby heads south of the border to give a speech with McGee in tow.
When a colleague's murder sends shockwaves through the team, Gibbs uncovers a surprising link to the crime.
Gibbs heads to Mexico to face his demons and make a startling decision.
With Paloma Reynosa still on the loose, Gibbs must take desperate measures to protect the ones he loves.
Petty officer is gunned down in a billionaire's Ferrari and the investigation leads the NCIS team to discover a link to a man Gibbs was named after.
The NCIS team investigates whether a fire on a U.S. Navy ship that served as a secret detention site for indicted terrorists was accidental or an intentional diversion for an escape. Meanwhile, Gibbs travels to his childhood home following news of his father's passing.
Covert identity created for one of Gibbs' undercover cases 20 years ago resurfaces after a murder victim is found living under the alias.
Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and his introduction to young, new-to-America Ducky.
A prison break by an inmate who had just three weeks left on a sentence compels the team to reopen the case of a naval officer's death that was originally investigated by Gibbs and Franks in the ‘90s, and enlist the help of retired special agent Vera Strickland. Also, the team has different views on what to include in a special Navy time capsule.