One Man's Trash is the 17th episode of NCIS Season 15 and also the 347th episode of the entire NCIS series.
Gibbs and Ducky investigate when they see an antique war stick on television, one that could be the missing murder weapon to a case that has been cold for sixteen years.
- Kasie Hines is introduced for the first time.
|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.|
|Eleanor Bishop||Emily Wickersham||Special 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. Despite being credited, Carroll does not appear in this episode.|
|Jacqueline Sloane||Maria Bello||NCIS Special Agent.|
|Donald Mallard||David McCallum||Chief Medical Examiner for the NCIS Major Case Response Team.|
|Clayton Reeves||Duane Henry||Interagency Liaison between MI6 and NCIS. Despite being credited, Henry does not appear in this episode.|
|Kasie Hines||Diona Reasonover||Forensic Scientist.|
|Clarence Wyatt||Kamal Angelo Bolden|
|Monica Keogh||Alyson Reed|
|George Keogh||Leonard Kelly-Young|
|Bill Lester||Clark Freeman|
|Jane Woods||Shireen Crutchfield|
|Lainie Schmidt||Ana Rey|
|Roy Baxter||Clint Culp|