Gut Punch is the 11th episode of NCIS Season 18 and also the 409th episode of the entire NCIS series.
Vance assigns McGee, Torres and Bishop to COVID compliance duty at a foreign affairs summit, where they discover a link to another NCIS team's murder case.
- Marcie Warren is introduced for the first time.
- Marcie Warren is played by Mark Harmons wife, Pam Dawber.
|Leroy Jethro Gibbs||Mark Harmon||Special Agent in charge of the NCIS Major Case Response Team. (suspended)|
|Timothy McGee||Sean Murray||Senior Special Agent and second-in command of the NCIS Major Case Response Team.|
|Eleanor Bishop||Emily Wickersham||Special Agent for the NCIS Major Case Response Team.|
|Nicholas Torres||Wilmer Valderrama||Special Agent for the NCIS Major Case Response Team.|
|James Palmer||Brian Dietzen||Chief Medical Examiner for the Major Case Response Team.|
|Kasie Hines||Diona Reasonover||NCIS Forensic Specialist.|
|Leon Vance||Rocky Carroll||Director of NCIS|
|Donald Mallard||David McCallum||NCIS Historian. Despite being credited, McCallum doesn't appear in this episode.|
|Marcie Warren||Pam Dawber||Investigative journalist.|
|Veronica “Ronnie” Tyler||Victoria Platt||NCIS Special Agent.|
|Moses McClaine||William Allen Young||U.S. Secretary of Defense|
|Dale Sawyer||Zane Holtz||NCIS Special Agent|
|Miles Thatcher||Andrew Pifko|
|Nasser Al-Kamal||Daniel Peera|
|Kendle Spotnitz||Preston Butler III|
|Yemeni Foreign Affairs Minister||Kamel Haddad|
|Little Pinky||Brick Jackson|