The Wall is the 19th episode of NCIS Season 14 and also the 325th episode of the entire NCIS series.
When a Marine is murdered at an event for the Honor Flight Network, a non-profit that arranges for veterans to visit the World War II, Korea and Vietnam War Memorials for free, the NCIS team must rely on an irritable Vietnam War veteran, Henry Rogers, to provide details on the victim's whereabouts throughout the day while McGee and Bishop investigate a juicy rumor about Quinn and Torres.
- During the episode, Navy Lieutenant Harmon Rabb Senior's name is seen on the Vietnam War Memorial Wall.
|Leroy Jethro Gibbs||Mark Harmon||Special Agent in charge of the NCIS Major Case Response Team.|
|Abigail Sciuto||Pauley Perrette||Chief Forensic Specialist for the NCIS Major Case Response Team.|
|Timothy McGee||Sean Murray||Senior Special Agent and second-in command of the NCIS Major Case Response Team.|
|Nicholas Torres||Wilmer Valderrama||Special Agent for the NCIS Major Case Response Team.|
|Alexandra Quinn||Jennifer Esposito||Special Agent for the NCIS Major Case Response Team.|
|Eleanor Bishop||Emily Wickersham||Probationary Agent for the NCIS Major Case Response Team.|
|James Palmer||Brian Dietzen||Assistant Medical Examiner for the NCIS Major Case Response Team.|
|Leon Vance||Rocky Carroll||Director of NCIS.|
|Donald Mallard||David McCallum||Chief Medical Examiner for the NCIS Major Case Response Team.|
|Clayton Reeves||Duane Henry||Officer with MI6.|
|Andrew Beck||Delpaneaux Wills||Corporal in the United States Marine Corps.|
|Henry Rogers||Bruce McGill||A Vietnam War veteran from Nebraska who served as a Sergeant in Force Recon and was awarded the Navy Cross.|
|Benjamin Harmey||Peter James Smith|
|1st Veteran||Richard Doyle||War veteran.|
|2nd Veteran||William C. Mitchell||War veteran.|
|Tour Guide (The Wall)||Dinora Walcott||Tour guide.|
|Dale Gruber||Will Radford|
|Bridget O'Leary||Samantha Colburn||The killer.|
|Trish Collinson||Jamie Sara Slovon|
|Fork Lift Driver||Jerry T. Adams||Uncredited role.|