Beneath The Surface is the 6th episode of NCIS Season 16 and also the 360th episode of the entire NCIS series.
After NCIS arrives at a Halloween crime scene, Torres recognizes the victim as a friend from federal law enforcement training while Jimmy thinks his lab is haunted by ghosts after objects keep mysteriously moving.
- Torres is revealed to have had a slight rivalry in Marine training with the murder victim.
- CIA Officer Wesley Clark was the man surveying Vance in Season 16 Episode 3 "Boom".
|Leroy Jethro Gibbs||Mark Harmon||Special Agent in charge of 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|
|Jacqueline Sloane||Maria Bello||NCIS Forensic Psychologist|
|James Palmer||Brian Dietzen||Medical Examiner for the Major Case Response Team|
|Kasie Hines||Diona Reasonover||NCIS Forensic Specialist; Abby's replacement|
|Leon Vance||Rocky Carroll||Director of NCIS|
|Donald Mallard||David McCallum||Chief Medical Examiner for the NCIS Major Case Response Team. Despite being credited, McCallum doesn't appear in this episode.|
|Westley Clark||Scott William Winters||CIA Officer.|
|Rachel Brentwood||Suzanne Savoy|
|John Zaprowski||Justin Welborn|
|Rosie Brown||Maria Gibbs|
|Bill Zaprowski||Sal Landi|
|Rod Carmale||Kirk Fox|
|Trucker Al||Rhomeyn Johnson|
|Dracula Clerk||Peter S. Kim|
|Adam Neil||Will Finley|
|Connor Reese||Todd Anthony||Navy Lieutenant|
|Trucker 1||Dawnmarie Ferrara|