Proof that the remaining 10% is worth dying for here.
These are recommendations made by Tropers for NCIS fanfics, all of which have to be signed to stay on the page. Feel free to add a fanfic of your own to the list, but remember to use the template found here.
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Very much recommended if you're a fan of Timothy McGee. Even though more often than not Emerald winds up putting McGee through utter hell, she can keep him - as well as the rest of the team - in-character and make him shine no matter what situation the plot puts him in. Ever wanted to see Tim as a superhero a la The The Incredibles, or getting the team involved in the Renaissance Fair? Emerald1's your author.
Stories focused on the family and the friendly relationships of the cast. Plot-focused stories or light day-in-the-life stories. Pretty much anything that isn't focused on romance.Ten Nonlinear Moves by Sequitur
Synopsis: Abby turns up at Gibbs' place in the middle of the night, covered in blood. When Gibbs finds a car crash nearby and a dead sailor, Abby becomes implicated in his murder, and it's up to the team to find out what really happened.
Synopsis: This fic starts off like your everyday Tony/whump fic, but a few chapters in it seems as though the author decided to take it in entirely a different direction, but it works! Gibbs and the team are captured by a sadistic fiend from Gibbs's past, who then offers Gibbs an ultimatum. Choose who dies... The end stunned This Troper, and nearly made me cry!
Synopsis: "Well...looks like...I've...finally...run out...Boss," he gasped quietly in the direction of the small opening. "And what is it you've run out of DiNozzo?" The gruff voice sounded just that bit scared, and rightly so. Tony smiled grimly. "Al...mosts."
Synopsis: Tony expected Ziva to understand his undercover mission better than anyone else. An alternate take on the emotional fallout of "Bury Your Dead" and the revelation of Tony's deceptions throughout season four, particularly regarding his relationship with Ziva.
Synopsis: When a simple case of theft explodes into an investigation of a long-running pedophile ring, Tony DiNozzo's darkest secret comes into the open, and only Gibbs has the strength - and the love - to save him from himself.
Synopsis: In a world where everyone has just developed some sort of psychic power, Empaths - like Tony DiNozzo - shut themselves away from the world to avoid an emotional overload. The only way to break the catatonia? Create a feedback loop with a single other person. Gibbs doesn't hesitate, but what will the ramifications be?
Synopsis: After investigating an attack on a Jewish lieutenant and her non-Jewish boyfriend, Ziva discovers a pattern of similar deaths. An undercover mission with Tony as her boyfriend leads to some dramatic discoveries.
Razor's Edge and the rest of the Breathe universe by colorguard28
Recommended by Kathadrion
Pairing: Tony/McGee (and later Abby/Palmer)
Synposis: Tony and McGee get together after Ziva stays in Israel. In Razor's Edge and its sequels, (a.k.a. the Breathe universe) we get to follow Tony and Tim's relationship as they deal with moving in together, coming out to coworkers and family, getting married and planning for a future together. Meanwhile, Tony starts having problem with his lungs, threatening his future as a field agent. The universe also frequently features the rest of their NCIS family, including Gibbs' dad and Vance and his family, as well as Tim's parents and sister.
Synposis: Some things will make you re-evaluate your life. Getting blown up, thinking you're fine, and then looking down and seeing a hunk of glass sticking out of your body is one of those things. Tim decides it's time to put his life on track and go after the things he wants, namely Abby and a family. Novel length McAbby romance. Some chapters decidedly NSFW.
Updated 8/15/2014 by Kirayoshi: As of Chapter 287, the author Keryl Raist has chosen to branch out her story into two separate paths; the original story "Shard To a Whole", and a parallel story called simply "Shards". "Shards" is an alternate universe version of "STAW", written largely because Keryl is introducing plotlines into her main story that some fans may find objectionable. Generally "Shards" is a more vanilla story (or, to borrow a metaphor from a chapter in "STAW", vanilla extract as opposed to the whole vanilla bean).
Synopsis: Tony takes a bullet for McGee, and his life flashes before his eyes. He also runs into more than one old friend - and an enemy or two. What will he think when he sees what could have been, and what will he do when he is faced with an impossible decision? AU towards the end of Season Ten. Inspired by "Life Before His Eyes".
Comments: This is probably the most in-character NCIS fanfiction I've ever read, and definitely the best I've seen involving Kate. Shipping-wise, there's a pretty even mix of Tony/Ziva and Tony/Kate, so you can read it regardless of which one you ship (and if you ship both, it's perfect). The banter between Tony and Kate is spot-on, which is impressive considering how much Tony's matured since the last time we saw him banter with Kate. Definitely read this with a box of tissues nearby. I had to stop a couple of times because I couldn't read through my tears.
Synopsis: "A folded parchment written in green ink appears, sealed by a wax coat of arms of a griffin, badger, raven, and snake. It reads "Dear Mister Potter..." However, Hogwarts School of Witchcraft and Wizardry receives a rejection letter in reply, with each reply written by a different Harry Potter." The NCIS story takes place between Episodes 5 and 6 of NCIS Season Two. Some years ago Gibbs worked a certain child abuse case where a British national tried to murder his nephew while on vacation in America. Now Teen Genius!Harry works for the NCIS team.
Synopsis: Crossover with Buffy the Vampire Slayer. Set after the finale of Buffy and immediately after the Season 6 finale of NCIS. Buffy raids a demon-infested camp in Somalia to retrieve a kidnapped Slayer—and finds someone else as well.
Synopsis: Crossover with JAG. Disturbing events in Iraq in 2003, and at home as well, leads to a joint JAG-NCIS investigation. The plot is set in early season 9 of JAG and pre season 1 of NCIS.
Comment: This one of the most well written JAG fanfics out there: a truly great combination of an engaging storyline, attention to details, and with spot-on characterizations of all the JAG/NCIS characters in it. Although the JAG characters take center stage, the NCIS characters (first appearing in chapter 34) are given equally meticulous treatment. The ending is somewhat anti-climactic as it fails to resolve the multiple storylines in this epic tale and connecting the two verses.
Synopsis: "When a kidnapped Tony DiNozzo is rescued by legendary - and supposedly dead - serial killers Dean and Sam Winchester, the NCIS team takes over the Winchester investigation. What they find is a file filled with contradictions and impossibilities."
Comments: The greatest NCIS/SPN Crossover that I've ever seen. The characters interact fluidly, everyone is perfectly in character, and the author manages to provide reasonable explanations for the NCIS to come up with instead of the more supernatural answers.