"Going Mobile" -- After the body of a Marine Lieutenant is found hidden under an 18-wheeler, the NCIS team tracks the vehicle's previous locations to pinpoint the crime scene and suspect. Also, Sloane encourages the team to sit down and talk about Ziva's recent reappearance, on NCIS, Tuesday, Oct. 8 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Emily Wickersham as NCIS Special Agent Eleanor "Ellie" Bishop, Wilmer Valderrama as NCIS Special Agent Nicholas "Nick" Torres, Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs, Cliff Chamberlain as Peter Buck. Photo: Sonja Flemming/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

“Lost Time” â€" The NCIS team investigates the murder of a Marine Sergeant in the States who was hailed as a war hero for his efforts overseas. Also, Gibbs turns to Doctor Grace Confalone (Laura San Giacomo) for advice after he uncharacteristically unravels and abandons his team at a crime scene investigation, on NCIS, Tuesday, May 14 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs, Laura San Giacomo as Doctor Grace Confalone. Photo: Cliff Lipson/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"Hail & Farewell" -- NCIS investigates the murder of a Marine Major believed to have been killed in the 9/11 attack on the Pentagon after human remains are discovered at a construction site. A personal history with the victim drives Gibbs to solve her crime, on NCIS, Tuesday, April 16 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Emily Wickersham, Mark Harmon. Photo: Sonja Flemming/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

"Once Upon A Tim" -- McGee reluctantly visits his high school after the unique computer password he used as a teenager is linked to the murder of a department of defense contractor. The case escalates when an intruder breaks into McGee's home in an attempt to steal his archaic high school computer, on NCIS, Tuesday, Feb. 19 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon, Wilmer Valderrama. 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