Visible crew/equipment: In one of the first episodes (2nd or 3rd) of Season 1, in an interrogation room scene, the camera pans around the table, and a crew member is visible in the far wall mirror, standing beside the camera in front of Gibbs.
Yankee White - S1-E1
Visible crew/equipment: When Kate is standing over the commander just before they take off, a red tape marker is visible between her feet. (00:09:45)
Yankee White - S1-E1
Visible crew/equipment: When Ducky tells Gibbs to go home and get some sleep, Gibbs walks over to the side and grabs some paper towels. When he does, the camera crew is reflected in the fridges opposite. (00:24:00)
Yankee White - S1-E1
Visible crew/equipment: When Gibbs is talking to Kate about the "Harrison Ford movie" noting the terrorists were reporters, just as Gibbs mentions the Secret Service turncoat, the white T-mark is visible on the floor. (00:33:25)
Visible crew/equipment: After Abby tells Tony that he's "like a piercing, it takes awhile for the throbbing to stop..." as Gibbs asks her about the theory, the reflection of a crew member wearing a white short-sleeve shirt is visible on the glass. (00:19:40)
Visible crew/equipment: While Gibbs and Caitlin are alone with Lt. Roberts trying to gain access to the Armed Forces Registry, just as Roberts acknowledges the critical 48 hours, the reflection of a crew member (presumably camera operator) is visible in the mirror, on the right side of the screen. (00:22:20)
Visible crew/equipment: When Tony tries to buy the sword for $500 the saleswoman walks away, and as he agrees to $600 in a following shot, the blue T-mark is visible on the floor. (00:23:10)
Visible crew/equipment: After Gibbs has Caitlin hydrate herself Caitlin asks the COB to show her to the Commander's facilities, and as Gibbs exits the Wardroom, the two T-marks are visible on the floor where Caitlin and the COB had been standing. (00:27:10)
Visible crew/equipment: When Nasser is brought to the interrogation room he raises his handcuffed arms and Gibbs nods no to removing them. In the next closeup of Nasser's handcuffs we can see the black taped mat on the floor (also visible in a following shot) which doesn't exist in overhead shots, then as the camera tilts up the reflection of the camera operator (wearing shorts) and camera are visible in the mirror. (00:16:30)
Marine Down - S1-E9
Visible crew/equipment: When the team meets the Colnol for the "off the record chat" they walk past a black 4x4 that reflects the camera following them. (00:07:35)
Marine Down - S1-E9
Visible crew/equipment: After Gibbs meets with the real Colonel Walsh, when he's back at NCIS Gibbs asks for Morrow's help to gain access to records, and in the overhead shot a crew member's leg (wearing jeans and a sneaker) is visible on the left side of the screen, directly behind Morrow. (00:11:50)
Marine Down - S1-E9
Visible crew/equipment: Just after Gibbs has fired at the car speeding away, a camera pops into shot on the screen right. (00:25:00)
Marine Down - S1-E9
Visible crew/equipment: In the final scene, the camera, crew and light panels are briefly captured reflected in the door of the silver sports car when Gibbs gets in. (00:43:00)
Visible crew/equipment: While Caitlin and Jane Doe are talking about blueberries it cuts to the doctor telling Gibbs that he can't release Jane Doe, and at the start of the next shot the pink T-mark is visible on the floor in front of Gibbs. (00:13:10)
Visible crew/equipment: When Gibbs tells Abby to run the print through the military database a tape marker is visible by his feet. (00:09:40)
Visible crew/equipment: When Tony stands up and walks over to Kate at the start, a blue tape marker is visible on the floor from where he starts walking. (00:01:35)
Visible crew/equipment: As the tow truck pulls the victims car away, the film crew are reflected in the paintwork. (00:06:40)
Visible crew/equipment: When Agent Fornell follows Gibbs for a private chat (in the elevator) there's an overhead long shot of Caitlin, Tony, and Fornell's two agents. It then cuts to a shot facing Caitlin, and we can see the white mat taped to the floor with black tape (which was not in the previous shot), at the bottom of the screen. (00:22:50)
Answer: I hadn't seen the backdoor pilots yet but while it wasn't explicitly stated, at least onscreen, I heard somewhere Vivian got either fired from NCIS due to jeopardizing a case, got resigned from the agency, or transferred to the FBI.
Raykvega423