Episode 1 : House Divided
Two months after Gibbs and McGee were last seen fighting an elusive group of rebels in a Paraguay jungle, the NCIS team in D.C. tirelessly searches for their missing colleagues. Also, Vance and Torres are summoned to a congressional hearing regarding the fallout from the Paraguay mission, on the 15th season premiere of NCIS.
Episode 22 : Two Steps Back
When evidence reveals an NCIS team member is a hitman's latest target, the team must search through old case files to determine who is seeking vengeance.
Episode 23 : Fallout
While Gibbs attends the memorial service for a friend who was lost at sea, he discovers that the deceased, Navy Captain Phillip Brooks (Don Lake), has been hiding in a fallout shelter after his boat was attacked and he swam to shore. Susan Walters guest stars as Marcy Brooks, the Commander's wife.
Episode 24 : Date with Destiny
Sloane is adamant that a man who held her hostage and tortured her years ago in Afghanistan and was believed to have been killed following her rescue, is alive and in D.C. Now, Vance and Gibbs fear Sloane is willing to risk everything to destroy him, on the 15th season finale.