NCIS season 16

The sixteenth season of the American police procedural drama NCIS originally aired from September 25, 2018, through May 21, 2019, at the same time slot as in the previous seasons, Tuesdays at 8:00 p.m. and contained 24 episodes.

NCIS revolves around a fictional team of special agents from the Naval Criminal Investigative Service, which conducts criminal investigations involving the U.S. Navy and Marine Corps.

Season 16 revolves around two major storylines after the premiere concludes the plot from the previous season's finale: a season-long arc involving a vigilante justice ring, and the reveal that Ziva David is actually alive halfway through the season. The latter fact is confirmed by her physical appearance in the final moments of the finale, "Daughters". This season takes on a darker undertone for Gibbs as he reveals to his team that he killed the man responsible for his wife Shannon and daughter Kelly's deaths.

Main

 * Mark Harmon as Leroy Jethro Gibbs, NCIS Supervisory Special Agent (SSA) of the Major Case Response Team (MCRT) assigned to Washington's Navy Yard
 * Sean Murray as Timothy McGee, NCIS Senior Special Agent, second in command of MCRT
 * Wilmer Valderrama as Nick Torres, NCIS Special Agent
 * Emily Wickersham as Eleanor "Ellie" Bishop, NCIS Special Agent
 * Maria Bello as Dr. Jacqueline "Jack" Sloane, NCIS Senior Resident Agent and Operational Psychologist
 * Brian Dietzen as Dr. Jimmy Palmer, Assistant Medical Examiner for NCIS (episodes 1–17), Chief Medical Examiner for NCIS (episodes 17-24)
 * Diona Reasonover as Kasie Hines, Forensic Specialist for NCIS
 * Rocky Carroll as Leon Vance, NCIS Director
 * David McCallum as Dr. Donald "Ducky" Mallard, Chief Medical Examiner for NCIS (episodes 1–17), NCIS Historian (episodes 17-24)

Recurring

 * Joe Spano as Tobias Fornell, Private Detective and former FBI Senior Special Agent
 * Robert Wagner as Anthony DiNozzo, Sr., father of former NCIS Special Agent Anthony DiNozzo
 * Scott William Winters as Westley Clark, CIA Agent
 * Margo Harshman as Delilah Fielding-McGee, DoD Intelligence Analyst and McGee's wife
 * Laura San Giacomo as Dr. Grace Confalone, psychotherapist
 * Don Lake as Phillip Brooks, Navy Captain
 * Larry Miller as Ed Slater, Jimmy Palmer's father-in-law
 * Melinda McGraw as Diane Sterling, deceased IRS Special Agent and Gibbs' and Fornell's ex-wife
 * Pej Vahdat as Nigel Hakim, British Humanitarian and terrorist
 * Mitch Pileggi as Wynn Crawford, U.S. Secretary of Defense
 * Kent Shocknek as Guy Ross, ZNN news anchor
 * Mike Farrell as Judge Miles Deakin
 * Elayn J. Taylor as Odette Malone, owner of Ziva's private office
 * Juliette Angelo as Emily Fornell, Tobias Fornell’s daughter
 * Naomi Grace as Kayla Vance, Leon Vance's daughter
 * Dionne Gipson as Mallory Madden, CIA Agent and Leon Vance's ex-girlfriend
 * Kate Hamilton as Faith Tolliver, Jack Sloane's biological daughter

Special guest star

 * Cote de Pablo as Ziva David, former Mossad Officer and former NCIS Special Agent

Guest

 * Erin Cummings as Marine Major Ellen Wallace, Gibbs's ex-fiancée
 * Charles Robinson as Ray Jennings, former Marine Lance Corporal
 * Fred Dryer as Thomas Fletcher, retired Marine Master Sergeant
 * Dabney Coleman as Army Corporal John Sydney
 * Dee Wallace as Claire Hall
 * Michele Boyd as Emily Ross
 * Charles Tyler Kinder as young Timothy McGee
 * Ashley Liao as Hayley
 * Megan Gallagher as Jennifer Leo, Under Secretary of the Navy
 * Merrick McCartha as Dr. Eugene Pierce