NCIS season 20

The twentieth season of the American police procedural television series NCIS premiered on September 19, 2022 on CBS during the 2022–23 television season, and concluded on May 22, 2023. This is the first season not to credit Mark Harmon who had portrayed Leroy Jethro Gibbs since the show's first season, and the last to feature David McCallum prior to his death on September 25, 2023. This season includes the 450th episode of the series. The season contains 22 episodes.

Premise

NCIS revolves around a fictional team of special agents from the Naval Criminal Investigative Service, which conducts criminal investigations involving the United States Navy and Marine Corps. Based at the Washington Navy Yard in Washington, D.C., the NCIS team is led by Supervisory Special Agent Alden Parker, an ex-FBI Special Agent and a skilled investigator.

Cast and characters

Main

Sean Murray as Timothy McGee, NCIS Senior Special Agent, Second in Command of MCRT, Acting Director of NCIS
Wilmer Valderrama as Nick Torres, NCIS Special Agent
Katrina Law as Jessica Knight, NCIS Special Agent
Brian Dietzen as Dr. Jimmy Palmer, Chief Medical Examiner for NCIS
Diona Reasonover as Kasie Hines, Forensic Specialist for NCIS
David McCallum as Dr. Donald "Ducky" Mallard, NCIS Historian and former Chief Medical Examiner
Rocky Carroll as Leon Vance, NCIS Director
Gary Cole as Alden Parker, Supervisory Special Agent (SSA) of the Major Case Response Team (MCRT) assigned to Washington's Navy Yard, former FBI Special Agent turned NCIS's agent

Notable guests

Joe Spano as Tobias Fornell, Private Detective and former FBI Senior Special Agent
Teri Polo as Vivian Kolchak, Alden Parker’s ex-wife and DOD paranormal investigator
Laura San Giacomo as Dr. Grace Confalone, psychotherapist
Carolyn Hennesy as Tara Flynn, the Secretary of the Navy
Patrick Labyorteaux as Olev Kozlov (previously appeared as Bud Roberts)
David Blue as Charlie Samuels
Lilan Bowden as Robin Knight, Jessica Knight's sister
Margo Harshman as Delilah Fielding-McGee, DoD Intelligence Analyst and McGee's wife
Juliette Goglia as Viktoria Valkov/Evelyn Shaw, Russian spy, Yuri's sister and Kostya's daughter
Gregg Binkley as Bob Stivers
Robert Picardo as Retired Marine Gunnery Sergeant Dale Harding
Rachel Ticotin as Joy Sullivan Aaronson, Alden Parker's first love
Zane Holtz as Dale Sawyer, NCIS Special Agent
Tania Raymonde as Chloe Marlene
Francis Xavier McCarthy as Roman Parker, Alden Parker's father
Michael Patrick Thornton as Jeremy Brighton, author, podcaster and online parenting coach for wheelchair users
Brigid Brannagh as Constance Miller, US senator
Scott Lawrence as DEA Agent Raymond Frank (previously appeared as Sturgis Turner in JAG from 2001 to 2005)
James Snyder as Dr. Miles Bauer
Ilia Volok as Kostya Valkov, Viktoria and Yuri's father