Episode 1 | Enter Sandman

In 1991 young Leroy J. Gibbs begins his new assignment in the NIS Department at Camp Pendleton. As a Probie, his first case is working with his future mentor, a young Mike Franks on a sniper investigation.

Episode 2 | Enter Sandman, Part 2

In 1991 a young Leroy J. Gibbs as a new NIS Agent at Camp Pendleton continues to investigate the case of a sniper with his future mentor young Mike Franks.

Episode 3 | Bend, Don't Break

A murder near Camp Pendleton leads Gibbs and the team to a suburban mall in San Diego, where Gibbs takes matters into his own hands. Jackson Gibbs pays Franks an unexpected visit.

Episode 4 | All's Not Lost

Still grieving the loss of his wife and daughter, Gibbs helps the team work a case involving a missing girl; the moment that irrevocably changed Gibbs' life is revealed.

Episode 5 | Last Rites

With the countdown on to an execution, Franks races to extricate the location of a missing body from a death row inmate and honor a promise he made to the victim's sister before time runs out.

Episode 6 | Incognito

Gibbs goes undercover for the first time with Lala as NIS works the case of a dead Navy seaman who may have been sharing top-secret intel that poses a threat to national security.

Episode 7 | One Flew Over

NIS investigates the murder of a dementia-afflicted Jane Doe. Also, flashbacks reveal the first time Gibbs met Franks.

Episode 8 | Sick as Our Secrets

Gibbs and the team investigate the case of a Navy priest who was killed in the confessional booth; Randy shows Gibbs the ropes of working a protective detail.

Episode 9 | Vivo o Muerto

The case of a missing woman who disappeared after a night of clubbing with a Navy seaman takes the team to Mexico, where they learn of a possible connection to Gibbs' past.

Episode 10 | Blue Bayou

As Leroy Jethro Gibbs prepares for his first Christmas without his wife and daughter, flashbacks reveal the unlikely journey that led to his first day on the job as a special agent.

Episode 11 | Flight of Icarus

Episode 12 | Touchstones

Episode 13 | Episode #1.13

Episode 14 | Episode #1.14

Episode 15 | Episode #1.15

Episode 16 | Episode #1.16

Episode 17 | Episode #1.17

Episode 18 | Episode #1.18