"Sound Off" -- After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident. Also, Palmer carefully interviews medical examiner assistant candidates, on NCIS, Tuesday, Jan. 21 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Wilmer Valderrama as NCIS Special Agent Nicholas "Nick" Torres, Sean Murray as NCIS Special Agent Timothy McGee, William R. Moses as Edison Geary. Photo: Eddy Chen/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"The North Pole" - Gibbs and the team assist Ziva (Cote de Pablo) with "the one thing" she said she would need to take care of before returning to her family, on NCIS, Tuesday, Dec. 17 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Sean Murray as NCIS Special Agent Timothy McGee, 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, Cote de Pablo as Ziva David. Photo: Greg Gayne/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

“IRL” â€" The NCIS team investigates a petty officer's murder that was live-streamed on a popular gaming app. Also, Gibbs watches his 11-year-old neighbor, Phineas (Jack Fisher), when his mom must leave on a last-minute trip, on NCIS, Tuesday, Nov. 26 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs, Jack Fisher as Phineas. Photo: Patrick McElhenney/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved.

"Musical Chairs" -- The NCIS team investigates the murder of a musician in the Navy's most elite band that performs at diplomatic events around the world, on NCIS, Tuesday, Nov. 19 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Eynas Younis as Navy Senior Chief Musician Neil Farzad, Wilmer Valderrama as NCIS Special Agent Nicholas "Nick" Torres, Emily Wickerham as NCIS Special Agent Eleanor "Ellie" Bishop, Sean Murray as NCIS Special Agent Timothy McGee. Photo: Greg Gayne/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"No Vacancy" -- While investigating a Marine's murder, the NCIS team uncovers a labyrinth of live-streaming spy cameras hidden in the rooms of a Virginia motel, on NCIS, Tuesday, Nov. 12 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Emily Wickersham as NCIS Special Agent Eleanor "Ellie" Bishop, Brian Dietzen as Medical Examiner Jimmy Palmer. Photo: Greg Gayne/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

“Institutionalized” â€" After a petty officer's son is found murdered at his “welcome home from prison” party, evidence suggests Kasie's lifelong best friend, Dante Brown (Devale Ellis), is the suspect, on NCIS, Tuesday, Nov. 5 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Emily Wickersham as NCIS Special Agent Eleanor “Ellie” Bishop, Diona Reasonover as Forensic Scientist Kasie Hines. Photo: Erik Voake/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"Wide Awake" -- NCIS investigates Marine Corporal Laney Alimonte (Camryn Grimes) after evidence suggests she murdered her neighbor while being treated for insomnia by a hypnotherapist. Also, Gibbs befriends his new neighbors after the 9-year-old's baseball crashes through his window, on NCIS, Tuesday, Oct. 22 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Laura San Giacomo guest stars as Doctor Grace Confalone. Pictured: Emily Wickersham as NCIS Special Agent Eleanor "Ellie" Bishop, Camryn Grimes as Marine Corporal Laney Alimonte. Photo: Michael Yarish/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"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

"Into the Light" - With their lives in danger, Gibbs and Ziva's rogue investigation takes an unexpected turn when a possible terrorist plot is revealed, on NCIS, Tuesday, Oct. 1 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Cote de Pablo as Ziva David, Mark Harmon as Special Agent Leroy Jethro Gibbs. Photo: Cliff Lipson/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved

"Out of the Darkness" - Ziva surprises Gibbs with a cryptic warning, prompting him to question why she remained underground for years while being presumed dead by family and friends, and what lead to her return, on the 17th season premiere of NCIS, Tuesday, Sept. 24 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon as Special Agent Leroy Jethro Gibbs, Cote de Pablo as Ziva David. Photo: Michael Yarish/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

"--¦and Executioner" -- After NCIS finds a secret government bank account that's funding a nationwide network of vigilante justice, the team must determine who is acting as judge and jury, on NCIS, Tuesday, May 7 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon as (NCIS Special Agent Leroy Jethro Gibbs, Rocky Carroll as NCIS Director Leon Vance. Photo: Michael Yarish/CBS В©2019 CBS Broadcasting, Inc. All Rights Reserved

"Judge, Jury--¦" -- After entering cold case DNA into the system, Kasie solves a 30-year-old murder case, but a loophole in the legal system may set the suspect free. Also, McGee visits an elite technology company in Silicon Valley that is offering him a highly paid position, on NCIS, Tuesday, April 30 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Pictured: Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs, Cooper Huckabee as Navy Petty Officer First Class Kyle Larson. Photo: Erik Voake/CBS В©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