Star Trek: Department of Temporal Investigations

Part of the Star Trek Novel Verse. A Day in The Limelight for the titular Department of Temporal Investigations, which monitors the integrity of the timeline and protects the history of the Star Trek universe from attempted Cosmic Retcons. The first novel, Watching the Clock, focuses on Lucsly and Dulmur, DTI field agents from the popular Star Trek Deep Space Nine episode "Trials and Tribble-ations". The second, Forgotten History, details the founding of the department in the days of Captain Kirk.

These books contain examples of:
"T'Viss was where I poured all my tendencies to lecture in extreme technical detail, while keeping the viewpoint characters at a remove that's more relatable to the audience as they struggle to make sense of what she's saying."
 * Action Girl: Jenna Noi.
 * Alien Geometries: Due to the properties of the finite pocket dimension which forms the Axis of Time, its Council Hub station touches its own opposite end, forming a Moebius Structure. Its public transport can be ridden in a straight line that ends up back where it started.
 * The Alliance: The Colloquium of Progress, a multi-species civilization represented in the Axis of Time. Plus of course the United Federation of Planets (and, in Watching the Clock, its new rival, the Typhon Pact).
 * Alternate History: One is explored to some degree in Forgotten History, almost in the tradition of the Star Trek Myriad Universes series.
 * Alternative Calendar: As well as multiple real-life calendars, including Christian, Islamic, Hindu and Mayan examples, the chapters of Watching the Clock offer dating systems from many Star Trek cultures, including Vulcan, Andorian, Cardassian, Klingon, Deltan, Tandaran and Risian. Most of these have been plotted out in full by the author, according to his annotations.
 * Amplifier Artifact: The Selakar used crystals that amplified their psionic abilities, for use as power sources, weapons, etc. Their most powerful allows them to permanently enslave other minds to their service, augmenting their natural ability to influence people.
 * And I Must Scream: Apparently, the Temporal Disruptor weapon causes its victims to "feel like it takes an age to die". This is largely why even those factions fighting against the Temporal Accords rarely use them.
 * Arc Welding: Every single Time Travel episode gets at least a Shout Out. The Arc Welding is particularly notable in Forgotten History, which links all of Captain Kirk's time-travel experiences (in the Original Series and the animated series) to create the story of the DTI's origins and early activities.
 * Arson Murder and Jaywalking: Agent George Faunt suffers a breakdown, attacks his colleagues, takes a researcher hostage and turns the DTI branch office into a seige zone. He also makes a lame time-related pun. Dulmur notes this last in a manner suggesting it's almost as serious as the other offenses.
 * Broken Pedestal: Lucsly faces this regarding . Also inverted, as Lucsly gradually realizes that Kirk is not the reckless Time Douche he was expecting.
 * Charm Person: Lirahn and other Selakar have this ability.
 * Continuity Nod: Many. Forgotten History is largely set in a similar timeframe to Star Trek the Motion Picture and the novel Ex Machina, and there are references to both. Among other nods is a mention of relief efforts to Mestiko.
 * Continuity Porn: Almost every time-travel story in Trek canon and the Star Trek Novel Verse gets a mention. Other nods are more integral to the plot - the Null from Star Trek Titan is referenced as the reason why the Axis of Time has only just made contact with the modern era. Only when galactic drift brought them past the Null was it felt acceptable for the Axis to send out scouts into our time, explaining why it's only now been discovered.
 * Cosmic Retcon: A large part of the DTI's purpose is to protect the timeline from these, and much of the Temporal Cold War revolves around trying to cause them without actively being seen to violate the Temporal Accords. In Watching the Clock, a particularly disturbing Cosmic Retcon occurs, when  is maliciously deleted from history by the primary villain.
 * Cultural Posturing: A little of this from T'Viss in Forgotten History (though she probably sees it as quashing Kirk's own "posturing"). She acknowledges that Jonathan Archer provided some assistance to T'Pau in rediscovering Surak's original writings and reforming Vulcan society. Some.
 * Double Meaning Title: Watching the Clock refers both to the DTI's role in protecting and monitoring the timeline, and to the mundane nature of its agents, who are most certainly not Starfleet-style adventurers. The DTI know that if they're having an adventure, they've already screwed up, and it's going to pay hell with the paperwork. No, they're 9-to-5 government employees, and like to keep things as unchaotic and, ideally, dull as possible.
 * Drowning My Sorrows: Cyral Nine, after quitting the Aegis. Lucsly, for a short time.
 * Embarrassing First Name: Marion Dulmur.
 * Emotions vs. Stoicism: Actually somewhat avoided with the Deltans. As a large part of their characterization revolves around their emotional maturity, they embrace their passions fully yet also demonstrate a calm and reserved demeanour much of the time. However, their conflict with the Carreon is partly this trope, though more on the Carreon side. Deltans are a flexible Ethical Slut culture, free with their emotions and desires (albeit also strongly disciplined), while Carreon are stoic and reserved, and rather intolerant of such openness. The Carreon also have a tendency to hypocritically show great interest in the Deltans' sexual nature while loudly condemning it.
 * Enemy Mine: Discussed in the alternate timeline from Forgotten History, where the Andorians, their homeworld under Vulcan occupation, have formed a strong alliance with the Klingons. A Klingon representative cheerfully acknowledges that had they not found a common foe in the Vulcans, the Klingons would likely consider Andorians their enemy too.
 * Expecting Someone Taller: Dulmur thinks this about Kirk after finally coming face-to-face with him. As for Lucsly, he was expecting someone far more reckless.
 * A God Am I: During the Great Psionic War, millennia before the rise of the Federation, many of the advanced telepathic races ended up calling themselves divine and insisting that "lesser" races worship them as deities. Their psionic gifts were offered as proof of divinity.
 * Gotta Catch Em All: One of Lucsly and Dulmur's assignments involved tracking down 13 Ky'rha artifacts (time travel devices) scattered across the quadrant and being sold on the black market.
 * Gut Feeling: Shortly into his partnership with Lucsly, Dulmur has one of these regarding a connection between the Manheim effect of the previous year and the vortex phenomenon they're currently investigating. Lucsly advises against "gut feelings", saying that everything the DTI deals with is counter-intuitive anyway. Nonetheless, Lucsly doesn't entirely dismiss Dulmur's insight, but insists on waiting until he has supporting evidence.
 * Heroic Willpower: An important part of the Deltans' characterization in Watching the Clock.
 * Higher Tech Species: The Vedala.
 * I Say What I Say: When President Bacco is temporarily duplicated (long story), the two presidents respond to a compliment with a simultaneous (somewhat sarcastic) "oh, please!" Amusingly, they also snark at each other for making the exact sort of grumpy, sarcastic comments that Bacco always makes.
 * Incredibly Lame Pun: One of the two Baccos makes the "beside myself" joke, to the great pain of her duplicate.
 * Insufferable Genius: Vard.
 * Interplay of Sex and Violence: The Deltan armed forces draw from those Deltans who have a...more combative...element to their sexuality. This being Deltans, it's usually well-controlled and healthy, but, put simply, the Deltan armed forces equate controlled force with sexuality. As a Deltan character says, if their rivals the Carreon insist on wanting conflict, who are the Deltans to deny it, particularly if some of their own can find a healthy outlet for their desires in the process?
 * Jumped At the Call: Subverted. We meet an eager young recruit who can't wait to have "adventures" as a Temporal Agent, but is told very quickly that the whole point of the DTI is to avoid adventure. In fact, if time travel happens the mission's already a failure. The recruit drops out the next day.
 * Kicked Upstairs: Kirk, in Forgotten History.
 * Look On My Works Ye Mighty and Despair: Most of the races represented in the Axis of Time have to deal with this. In the time periods they consider to be "the present", they're often thriving cultures, indeed the leading races of their interstellar communities. But thanks to the Axis they know that a few thousand years later and they'll have been forgotten, being at best archaeological curiosities to the next group of spacefaring cultures and at worst lost to history.
 * Manipulative Bastard: . And Future Guy.
 * Ms. Exposition: T'Viss, crotchety temporal physics lecturer extraordinaire. Word of God confirms it:

""If that revenge backfired and led to my arrest, then all the more need for the revenge itself to stand"."
 * My Name Is Not Durwood: Professor Vard refers to Dulmur as Agent Duller, Agent Dummer, and Agent Dombler, among others.
 * Mysterious Employer: "Future Guy", of Star Trek Enterprise fame. The mystery is finally resolved at the climax of Watching the Clock.
 * Mysterious Past: We get no real information on Lucsly's backstory, in contrast to almost every other major character within the DTI. Of course, this being Lucsly, his backstory is probably very, very dull.
 * Parental Favoritism: Paul Manheim insists that his brother was the favorite, explaining his subconscious resentment of said brother.
 * Place Beyond Time: The Axis of Time, a pocket dimension that allows travel between various eras while itself existing outside normal space-time.
 * Precursors: Among others, the Arret Empire. Two species in partnership - one standard Humanoid, the other Vulcanoid - spread themselves across the stars and founded countless colonies. Many of the Federation's member races, including Deltans and Vulcans, are strongly implied to be descendants of these colonies.
 * Retcon: A subtle one; Kirk being Kicked Upstairs at the end of his five-year mission, with Enterprise given a major refit, was established in Star Trek the Motion Picture and explored further in the novel Ex Machina. In Forgotten History, this is now shown to happen in part due to influence from Admiral Delgado, to further his well-meaning, if overzealous, ambitions for time travel experiments. Specifically, with the Enterprise undergoing a major refit, its old engines are his for the taking, along with their unique properties allowing artificial time travel.
 * Ret Gone:
 * Revenge Before Reason: The Sponsor has a little of this:

"Chapter XX - Time out of Joint - A Doomsday"
 * Ripple Effect Proof Memory: The Department of Temporal Investigations keeps records protected by phase discriminators, shielding the data from alterations in the timeline. Although the agents themselves will have no knowledge of the previous history, they can research their own files to determine if changes have been made.
 * Secret Government Warehouse: The Vault on Eris is where the DTI stores all its confiscated time travel tech, including among other things, a large blue box and an antique temporal carriage.
 * Sequel Hook: Sort of. Before he is captured at the end of Watching the Clock, "Future Guy" is said to have been hiding in the 22nd Century during the Romulan War. In other words, the time frame of the Star Trek Enterprise Relaunch.
 * Set Right What Once Went Wrong: Averted. The crew of the Verity, shot forward in time to find their planet in ruins following the Borg Invasion, want to try and return to their original time to give warning. They're prevented from doing so, and it's explained why their decision was the wrong one, no matter how subjectively understandable the desire.
 * Shown Their Work: The author, Christopher L. Bennett, has a degree in Physics and it shows.
 * Space Elves: The Deltans are fleshed out in Watching the Clock, and have aspects of this trope.
 * The Vedala in Forgotten History fit the bill. They're generally benevolent, older than other spacefaring races, very advanced and isolationist, and seem ever-so-slightly smug about their status in relation to younger "child" races. Behind their reasonable manner is the clear belief that Vedala are better than you.
 * Stable Time Loop: Kirk, Spock and Scotty only know how to slingshot with warp engines other than Enterprise's because  is not happy.
 * Teeth Clenched Teamwork:
 * Despite its claim to unity, the Typhon Pact is still riddled with rivalries and the various member states' government agencies have yet to form a shared bureau for dealing with temporal integrity.
 * The DTI and their 29th-century, 31st-century, etc. equivalents.
 * Ten Minute Retirement: Lucsly, after his faith that the DTI will protect the timeline's integrity is shattered when, on advice from a future agency, he is refused permission to prosecute Janeway for her actions in Endgame. Dulmur talks him into returning.
 * Time Crash: The climax of Watching the Clock, caused by a Gambit Pileup involving at least a dozen temporal factions and Insufferable Genius Vard.

"Chapter XI - Décade II Quartidi Frimaire, Année DXC de la République, French Republican Calender - A Friday"
 * Another type occurs in Forgotten History, where a time travel experiment Goes Horribly Wrong, creating a "confluence" where the past and present of two separate timelines overlap, with the potential that people could stumble between universes and / or times and accidentally rewrite each others histories.
 * Time Police
 * Time Travel: The books feature this, of course, but it's important to note that the DTI wants to avoid it wherever possible. The department exists to protect against time travel and clean up the mess that results, not travel in time themselves.
 * Timey Wimey Ball: Averted. The books aim for consistancy regarding how time travel works in the Trek universe. Given that the onscreen source material is often guilty of the Timey Wimey Ball approach, that's a tall order, but the author was able to tie most of the existing examples of time travel into a coherent theory on Trek temporal physics.
 * Unusual Chapter Numbers: Each chapter of Watching the Clock has a subtitle with an Alternative Calendar date:


 * Weirdness Magnet: Establishes that temporal anomalies turn you into one of these, explaining a great deal about Star Trek as a whole. Once you're exposed to one, probability is altered such that it becomes inevitable that you end up exposed to a whole lot more.