Enemy on the Hill is the fourth episode in Season Nine of NCIS and the 190th episode of the entire NCIS series.
The team must find out who hired a hit-man to kill a Navy Lieutenant Commander while Abby goes through a series of tests and uncovers some startling secrets concerning her own family history which leaves her stunned.
In downtown D.C., reporter Samantha Tate fixes her hair.
Seconds later, her cameraman announces that they're set.
Taking a deep breath, Tate then remarks that later this week, Congress will be on a $14 billion appropriation for construction of a new class aircraft carrier.
She also states that many watchdog groups feel that the money would be better spent at home on schools and infrastructure before asking a Female Passerby for her opinion.
The Passerby remarks that's a really difficult question for her to answer and that she doesn't really know what the military needs before stating that's a husband question and that she'd have to talk to him to see how she feels about it.
Tate thanks her, remarking that her honesty is refreshing.
"Okay, we're good", the cameraman remarks.
Once it's over, Tate tells the cameraman or "Chad" about the guy with the camera.
It then pans to show a tall man wearing a big cap and glasses with a camera.
Tate approaches him, identifying herself and her cameraman as being with ZNN before wondering if they could interview him for the evening news.
"No", the man states, walking off.
Tate is not willing give up and asks the man again despite the man demanding that the camera not be pointed at him.
The man attempts to cross the road, only to get struck by a van which abruptly stops, its tyres screeching.
This causes various people in the area to begin screaming.
Seconds later, the camera shows the man lying on the road, unconscious and bleeding.
Tate approaches the man and kneels down beside him, yelling for someone to call 911.
The camera pans down to examine the man who lies there, his eyes open and face expressionless before revealing that he's carrying a shoulder holster which has a gun with a silencer attached to it.
In the bullpen, with a photo of Paul Marvin Arliss now on the monitor, McGee remarks that it's hard to believe that the guy was an infamous killer and that up until yesterday, Arliss's only claim to fame was a Salesman of the Year as a manufacturer's rep for a furniture company.
"He evaded the FBI for years by hiding in plain sight", DiNozzo remarks before stating that in a weird way, they've gotta admire the guy.
Gibbs arrives into the bullpen and responds by headslapping DiNozzo before stating that Arliss is a mass-murderer.
- Abby learns that she's adopted.
|Leroy Jethro Gibbs||Mark Harmon||Special Agent in charge of the NCIS Major Case Response Team.|
|Anthony DiNozzo||Michael Weatherly||Senior Special Agent of the NCIS Major Response Team.|
|Ziva David||Cote de Pablo||Junior Special Agent of the NCIS Major Response Team.|
|Abigail Sciuto||Pauley Perrette||Chief Forensic Specialist of the NCIS Major Response Team.|
|Timothy McGee||Sean Murray (actor)||Special Agent of the NCIS Major Response Team.|
|Leon Vance||Rocky Carroll||Director of NCIS.|
|Donald Mallard||David McCallum||Chief Medical Examiner of the NCIS Major Response Team.|
|Detective Danny Sportelli||Jack Conley (actor)||Homicide Detective with Metro PD.|
|Special Agent Thomas Survoy||Morocco Omari||NCIS Special Agent who previously appeared in the Season 3 episode, "Boxed In".|
|Lieutenant Commander Geoffrey Brett, USN||Brett Tucker||U.S. Navy.|
|Nicholas Sandlock||Michael B. Silver||A lobbyist working with Geoffrey Brett.|
|Drew Turner||Melissa Ponzio||Financial Planner.|
|Mrs. Roach||Shannon Wilcox||A woman who appears in the episode.|
|George Kaplan (alias)||Brett Tucker||An alias for Commander Brett and unseen decoy identity. This is a reference to the 1950s movie, "North by Northwest".|
|Kyle Davis||Daniel Louis Rivas||Abby Sciuto's biological brother.|
|Samantha Tate||Sibila Vargas||ZNN Reporter.|
|Female Passerby||Karly Rothenberg||A woman who appears in the episode.|
|Paul Marvin Arliss||Kevin Cotteleer||A man who is actually a contract killer and who later dies from injuries sustained after he was hit by a bus.|
|Afghan Teacher||Sara Faiella||Uncredited Role.|