NCIS season 13

The thirteenth season of the American police procedural drama NCIS premiered on September 22, 2015, in the same time slot as in the previous seasons, Tuesdays at 8 pm.

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. The series was renewed for a thirteenth season by CBS on Monday, May 11, 2015. Michael Weatherly, who stars as Anthony DiNozzo on the show, departed the series in the season finale. On February 29, 2016, NCIS was renewed for seasons fourteen and fifteen.

Production
The series was renewed for a thirteenth season by CBS on Monday, May 11, 2015. Production on this season started in late July. On January 5, 2016, CBS announced Weatherly's departure from the series after thirteen seasons. Scottie Thompson returned as Jeanne Benoit, Tony's ex-girlfriend, in episodes 8 and 16. Scott Bakula, Lucas Black, Zoe McLellan, and Shalita Grant star in a crossover with NCIS: New Orleans, in the episode "Sister City (Part I)", as NCIS Special Agent Dwayne Pride, NCIS Special Agent Christopher LaSalle, NCIS Special Agent Meredith "Merri" Brody, and NCIS Special Agent Sonja Percy, respectively.

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
 * Michael Weatherly as Anthony DiNozzo, NCIS Senior Special Agent, second in command of MCRT
 * Pauley Perrette as Abby Sciuto, Forensic Specialist for NCIS
 * Sean Murray as Timothy McGee, NCIS Special Agent
 * Brian Dietzen as Jimmy Palmer, Assistant Medical Examiner for NCIS
 * Emily Wickersham as Eleanor "Ellie" Bishop, NCIS Special Agent
 * Rocky Carroll as Leon Vance, NCIS Director
 * David McCallum as Dr. Donald "Ducky" Mallard, Chief Medical Examiner for NCIS

Recurring

 * Alan Dale as Thomas Morrow, Homeland Security Section Chief and former NCIS Director
 * Joe Spano as Tobias Fornell, FBI Senior Special Agent
 * Richard Riehle as Maynard County Sheriff Walt Osorio and Sherlock Consortium member
 * Kent Shocknek as Guy Ross, ZNN news anchor
 * Adam Campbell as young Donald Mallard
 * Salli Richardson-Whitfield as Carrie Clark, former FBI Special Agent, turned criminal attorney
 * Jessica Walter as Judith McKnight, Sherlock Consortium member
 * Todd Louiso as Lyle Waznicki, Sherlock Consortium member
 * Joel Gretsch as Stan Burley, NCIS Special Agent and former member of Gibbs' team
 * Scottie Thompson as Jeanne Woods, Tony's ex-girlfriend
 * David Dayan Fisher as Trent Kort, rogue CIA Agent
 * Robert Wagner as Anthony DiNozzo, Sr., Tony's father
 * Leslie Hope as Sarah Porter, Secretary of the Navy
 * Margo Harshman as Delilah Fielding, DoD Computer Specialist and McGee's girlfriend
 * Juliette Angelo as Emily Fornell, Tobias Fornell's daughter
 * Kelli Williams as Maureen Cabot, NCIS Special Agent
 * Jamie Bamber as Jake Malloy, NSA attorney and Bishop's ex-husband
 * Mimi Rogers as Joanna Teague, CIA Agent and Ned Dorneget's mother
 * Sarah Clarke as Tess Monroe, FBI Senior Special Agent
 * Duane Henry as Clayton Reeves, MI6 Senior Officer
 * Mila Brener as Kelly Gibbs, Gibbs' deceased daughter
 * Jon Cryer as Dr. Cyril Taft, surgeon who operates on Gibbs
 * Laura San Giacomo as Dr. Grace Confalone, psychotherapist
 * Marina Sirtis as Orli Elbaz, Mossad Director

Guest appearances

 * Muse Watson as Mike Franks, deceased retired Senior Special Agent for NCIS and Gibbs' former boss
 * Scott Bakula as Dwayne Pride, NCIS Supervisory Special Agent (SSA) in New Orleans
 * Lucas Black as Christopher Lasalle, NCIS Senior Field Agent in New Orleans
 * Zoe McLellan as Meredith "Merri" Brody, NCIS Special Agent in New Orleans
 * Shalita Grant as Sonja Percy, NCIS Special Agent in New Orleans
 * Giles Matthey as Daniel Budd, NCIS target in the international terrorist group 'The Calling'
 * Daniel Zolghadri as Luke Harris, recruit to 'The Calling' who shot Gibbs (12.24)
 * Tyler Ritter as Luca Sciuto, Abby's brother
 * Cassidy Freeman as Eva Azarova, Russian sleeper agent
 * Andy Beckwith as HM Prison Service Custodial Manager Chester Grimm
 * Vince Nappo as Jacob Scott, former prisoner being pursued by Tony along with MI6
 * Michelle Obama as herself
 * Stephanie Koenig as Lauren Hudson, mistress of Marine Captain Dean Hudson