"Perennial" -- Following an active shooter lockdown at a naval hospital, the NCIS team searches for a suspect who fled the scene. Also, someone from Sloane's past was inside the hospital and is a key witness in the case, on NCIS, Tuesday, April 9 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Kate Hamilton as Faith Tolliver Photo: Sonja Flemming/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"Mona Lisa" -- Torres relies on his team's investigative skills after he wakes up on a dilapidated fishing boat, covered in blood and unable to remember the last 12 hours, on NCIS Tuesday, April 2 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Wilmer Valderrama. Photo: Sonja Flemming/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"Silent Service" -- Director Vance is notified by the Pentagon that the nuclear submarine Gibbs and Bishop are aboard to conduct a murder investigation has gone radio silent, on NCIS Tuesday, March 26 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Series star Rocky Carroll directed the episode. Pictured: Mark Harmon, Emily Wickersham. Photo: Ali Goldstein/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

“Bears and Cubs” â€" Jimmy is torn between family and work after his father-in-law, Ed (Larry Miller), asks him to tamper with evidence from NCIS' current murder investigation. Also, Ed's poker buddy, Anthony DiNozzo, Sr. (Robert Wagner), offers to help with the case, on NCIS Tuesday, March 5 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Larry Miller as Ed Slater, Robert Wagner as Anthony DiNozzo, Sr, Brian Dietzen as Dr. Jimmy Palmer. Photo: Michael Yarish/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

“Crossing the Line” â€" The NCIS team investigates a man overboard fatality from a Navy destroyer at sea. Also, Torres is frustrated with Vance's assignment to mentor three high school students, on NCIS, Tuesday, Feb. 26 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon, Sean Murray Photo: Cliff Lipson/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"She" -- After a malnourished and confused 9-year-old is found hiding in a storage unit, NCIS reopens an old missing persons case when the girl is believed to be the daughter of a Navy recruit who disappeared 10 years ago. Also, Bishop discovers notes that Special Agent Ziva David kept on the case long after NCIS officially stopped investigating, on NCIS, Tuesday, Feb. 12 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Diona Reasonover, Emily Wickersham. Photo: Monty Brinton/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"The Last Link" -- An old family friend, Army Corporal John Sydney (Dabney Coleman), beseeches Gibbs to join him on a road trip to search for a missing military I.D. bracelet. Also, a Navy Lieutenant in NCIS protective custody is poisoned by an infamous drug dealer, on NCIS Tuesday, Jan. 15 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon, Dabney Coleman. Photo: Sonja Flemming/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved

"Toil and Trouble" -- United States Secretary of Defense Wynn Crawford (Mitch Pileggi) shuts down Gibbs' murder investigation and demands that Special Agents McGee and Torres be arrested for their actions in the case, on NCIS, Tuesday, Jan. 8 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Emily Wickersham, Mark Harmon. Photo: Sonja Flemming/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved

"What Child Is This?" -- The team's holiday plans are put on hold when the murder investigation of a Navy veteran includes the discovery of a newborn baby who has no identification and no apparent ties to a family, on NCIS, Tuesday, Dec. 11 (8:00-9:00 PM, ET/PT) on the CBS Television Network. . Pictured: Sean Murray, Emily Wickersham, Wilmer Valderrama. Photo: Michael Yarish/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved

"Tailing Angie" -- When the lead suspect of an unsolved and high-profile robbery case is released from prison, the NCIS team resumes their investigation with an undercover stakeout, on NCIS, Tuesday, Dec. 4 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Cassi Thomson, Maria Bello. Photo: Michael Yarish/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved

“Friendly Fire” â€" McGee and Bishop travel to Afghanistan after a murder case in the states is linked to a string of soldiers killed by friendly fire overseas. Also, Kasie leaves the lab and accompanies Torres into the field to process additional forensic evidence, on NCIS, Tuesday, Nov. 20 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Sean Murray, Brian Dietzen Photo: Sonja Flemming/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved

ÒThird WheelÓ Ð GibbsÕ quiet vacation at his remote cabin is interrupted by a surprise visit from Tobias Fornell (Joe Spano) and Navy Captain Phillip Brooks (Don Lake), as well as a call from NCIS asking for his help locating a robber hiding in the woods near him, on NCIS, Tuesday, Oct. 16 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Don Lake, Joe Spano. Photo: Sonja Flemming/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved

"Boom" -- One of the NCIS agents is starstruck after the team investigates an explosion outside the home of Navy Petty Officer First Class Todd Nicholas (Cameron Radice) and his wife, popular reality TV star Sheba Nicholas (Tara Holt). Also, Vance continues physical therapy for the injuries sustained when he was held hostage, on NCIS, Tuesday, Oct. 9 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Sean Murray, Emily Wickersham, Mark Harmon, Wilmer Valderrama. Photo: Sonja Flemming/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved

ÒLove Thy NeighborÓ Ð After a Navy lieutenant is found murdered in his hot tub, the team interviews several families in the victimÕs peculiar neighborhood. Also, Torres must face the consequences after a volatile night out with Palmer, on NCIS, Tuesday, Oct. 2 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Brian Dietzen, Diona Reasonover, David McCallum. Photo: Robert Voets/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved