Trivia: When Tony and Delilah are listing disabled film characters, Delilah mentions Logan Cale, which is the character Michael Weatherley played on Dark Angel.
Trivia: This is the first time John M. Jackson has played AJ Chegwidden since he left JAG at the end of its ninth season.
Trivia: The show originally premiered as "Navy: NCIS", and ran with that title for the first season. Beginning with season 2, the title was shortened to just "NCIS", after the producers convinced CBS (the network had insisted on the longer title) that "Navy: NCIS" was redundant, since the "N" in "NCIS" stands for "Naval".
Trivia: Since the two-part episode "Legend" is also technically part of NCIS: Los Angeles canon, it makes Gibbs, Tony, Abby, and Ducky the only characters who have appeared on the two NCIS shows and its parent series JAG. Abby is the only one who also appears in a stand-alone NCIS: LA episode.
Agent Afloat - S6-E2
Trivia: Season 6, "Agent Afloat": Maybe real aircraft carriers posing as fictional ones shouldn't let viewers see their registration numbers. When this episode aired, producers heard from several "carrier purists" complaining that CVN74 is the U.S.S. John C. Stennis, not the (non-existent) Seahawk.
Trivia: While talking with Amanda Reed, Tony calls himself "Stringfellow", and later tells McGee that he got the name from the TV series Airwolf, which was also created by Donald Bellisario.
Trivia: There is an episode where someone is killing people in the same ways McGee describes in his yet unpublished next book. Over the course of the investigation, they question McGee's book publisher. Along The Wall of her office, there are pictures of all the authors that the company publishes. Show creator Donald Bellisario is pictured as one of those authors.
Yankee White - S1-E1
Trivia: When Commander Trapp and Major Kerry collapse, the foam coming out of their mouths is dissolving Alka-Seltzer antacids.
Trivia: The titles of the season 8 episodes "Enemies Foreign" and "Enemies Domestic" are references to the Presidential oath and the oath taken by members of the military to defend the Constitution.
Trivia: In the beginning when Gibbs and Tony are talking about a crossword puzzle, Gibbs asks Tony for a TV drama 8 letters, Tony answers with "St Elsewhere". Gibbs is played by Mark Harmon who was Dr. Robert 'Bobby' Caldwell for 4 seasons of St. Elsewhere.
Trivia: There is a picture of Donald P. Bellisario (one of the show's creators) hanging on the "NCIS Most Wanted Wall."
Trivia: Michael Weatherly is the only cast member Donald Bellisario allows to ad-lib lines.
Yankee White - S1-E1
Trivia: During the flight on Air Force One, Gibbs mentions the Harrison Ford movie of the same name, and alludes to a double agent inside the Secret Service. The character he's referring to, played by Xander Berkeley, is also named Gibbs.
Trivia: In one scene, Gibbs says that when Ducky was younger, he looked like Illya Kuryakin. This was the character David McCallum played on "The Man From U.N.C.L.E."
Trivia: In the scene where Ziva and Tony board the British ship, the scene cuts to the exterior shot of the British ship and shows the ship flying the Union Jack flag. Unfortunately the ship is a United States Navy AEGIS Destroyer and although the British are Allies, none of the AEGIS ships have been sold to the British Navy.
Lt. Jane Doe - S2-E4
Trivia: This was the first episode to feature the black and white freeze frame at the beginning of each act.
Answer: I dont believe it is ever mentioned, but like most pilot episodes the characters are often changed, replaced or even removed in this case.