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Clue, Evidence, and a Smoking Gun

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Sometimes deduction takes leaps of logic to come to a simple conclusion based on very minor details. Sometimes it's obvious. Sometimes however, the deductor uses his Bat Deduction or Sherlock Scan skills to explain his conclusion, and then adds a Smoking Gun for good measure, making the previous deductions quite redundant.

Compare Sherlock Can Read, Asymmetric Dilemma. Has some similarity with Arson, Murder, and Jaywalking (or Bread, Eggs, Milk, Squick) but with weak arguments leading up to one strong one (and used as a deduction).



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    Anime and Manga 
  • During the 4th Shinobi War in Naruto, Haku deduces that a bird flying above him is a fake as he knows that this particular species flies in pairs, but only during the winter. That makes their behavior suspicious. Also, he points out, it is releasing bright red signal smoke.
  • The final sketch in Miss Kobayashi's Dragon Maid's sixth DVD special has Tohru do this while playing the part of Sherlock Holmes, pointing out that Lucoa just came out of the bath because of her wet hair, sweaty body, and complete lack of clothing.

    Comic Books 
  • In an issue of Young Justice, where a mysterious new girl helps the team out during a fight, then disappears. When trying to figure out who she is, this exchange occurs:
    Robin: Her name's "Empress".
    Superboy: Wha...? How'd you figure that one out?
    Robin: It was through a series of clues and observations, with a few inferences thrown in for good measure. Oh, and there was also that...(points to the word "Empress" burned into the ground)

    Fan Fiction 
  • RainbowDoubleDash's Lunaverse: In the non-cannon side-story, Dinky & the Blanks, the Big Bad tries performing a Sherlock Scan on the Element Bearers, only for Trixie to quickly shut him down by pointing out anyone can see that Ditzy has strabismus, or that Lyra's a musician, or that Carrot Top is a farmer.
  • In A Spartan in Westeros, Master Chief investigates Brandon Stark's fall from the Broken Tower. The next day, when Tyrion swings by to discuss the topic, he instantly fingers Cersei and Jaime as the culprits. An initially-flippant Tyrion challenges him to prove it, so the Spartan shows him the foot, hand and fingerprints they left behind, a hair from Cersei, and drops of mixed sexual fluids, finishing by telling Tyrion he has Brandon's direct statement.

    Film - Live Action 
  • Jimmy the Gent: Jimmy runs a scam where he recruits people to impersonate the long-lost heirs of rich folks who die intestate. His sidekick Lou has dug up a suitable fake heir, a woman who has the required identifying mark, a mole on her hip. Except that he got it wrong, as Jimmy explains.
    Jimmy: It wasn't a mole, it was a wart; it wasn't on her hip, it was on her shoulder; and and it wasn't a dame, it was a guy!
  • Used in Miss Congeniality 2.
    Joel: And, may I say, I also recently went through a breakup.
    Gracie: I didn't go through a breakup.
    Joel: Puffy eyes, no sleep, irritable. And some of the other agents told me about it.
  • The Naked Gun 2 1/2 has the lab break down the fibres, prints, DNA and dirt particles of the footprint and start to take a geological breakdown of the city. When the detective says they don't have that much time, they mention that the criminal also dropped his wallet by the curb and they may be able to use that as well. They have a habit of this, because in the third movie, they break down the origin and composition of the paper in a letter to find out who sent it, and when that fails, they then mention that the letterhead says "Statesville Prison" on it.
  • Parodied in Bullshot. Bullshot Crummond does a Sherlock Scan on a blade of grass and works out the kidnapping that's just occurred. One of his companions then points out the getaway vehicle left abandoned in the ditch nearby.
  • Parodied in Van Helsing.
    Van Helsing: Whatever it is, it appears to be human. I'd say he's a size 17. Around 360 pounds. 8.5 to 9 feet tall. He has a bad gimp in his right leg and three copper teeth.
    Anna Valerious: How do you know he has copper teeth?
    Van Helsing: Because he's standing right behind you.
  • In Night at the Museum, Larry tries to track down the caretakers who've fled with the Tablet and recruits Sacajawea to help, assuming she's a Scarily Competent Tracker. She goes outside, looks at the car tracks, and tells him the car tried to flee but spun out and wrecked. When Larry asks her how she knows, she points at the wrecked car on the other side of the building.
  • Parodied in the sort-of-comedy Smoke Signals:
    Thomas: Hey Victor! I'm sorry about your dad.
    Victor: How'd you hear about it?
    Thomas: I heard it on the wind. I heard it from the birds. I felt it in the sunlight. (Beat) And your mom was just in here, cryin'.

  • Ur-Example is probably found in The Hound of the Baskervilles where Holmes is able to deduce that Mortimer's dog must be a curly-haired seeing it coming up with its master.
  • In Quidditch Through the Ages, the fictional author describes the discovery of round metal balls believed to be Bludgers, and not cannonballs, based on very subtle indents made by Beaters' bats, the perfect symmetry only achievable by magic, and the fact that the balls started flying around trying to hit the discoverer when removed from their case.
  • The Martian: Mark identifies a type of battery by a set of "subtle clues", the last of which is the label printed on it.
  • Discworld:
    • In Thud!, the Lemony Narrator describes the architectural features that tell a visitor they've entered Ankh-Morpork's dwarf district, before adding that all the short people with beards and axes are a bit of a clue as well.
    • In Moving Pictures, Gaspode the Wonder Dog says that the mind-controlling magic of Holy Wood has got Dibbler "worse than anyone". When Victor asks how he can tell, Gaspode replies "Partly a'cos of subtle signs what you don't seem to be abler recognise, and partly a'cos he's actin' like a complete twerp, really."
  • In "Tomorrow Town", after a man is bludgeoned to death, detective Richard suspects that the master computer Big Thinks was responsible. His partner points out that, "[Big Thinks] hasn’t got sentience, a personality, a motive, or, most importantly, arms."
  • In the Rivers of London short story "The Domestic", Peter is investigating a woman whose flat has been occupied by an entity she believes to be the ghost of her husband. His narration notes that it doesn't quite behave the way ghosts normally do; that it appears as her husband did as a young man, while ghosts usually appear as they did on death; that the shoes don't match his Teddy Boy appearance; and that he doesn't remember the name of his mother. He then tells the woman (and the reader) that he checked before coming round, and her husband isn't even dead.

    Live-Action TV 
  • Parodied on the 1960s spy spoof Get Smart, where Max would begin to list a series of utterly nonsensical clues to the solution of an obvious mystery, and 99 would supply the smoking gun...which Max would then hastily claim was the last clue in his list. The joke is done in the movie Get Smart Again, but with Max listing off actual clues before providing the smoking gun himself.
  • Community:
    • In the season 2 episode "Paradigms of Human Memory" (the non-recycling clip show), Abed deduces that Britta and Jeff are sleeping together from several subtle indications, and lastly: Abed saw them getting dressed together in a dormitory.
    • Parodied in "Aerodynamics of Gender," where Joshua the gardener makes some seemingly innocuous remarks to Troy and Jeff that turn out to have double meanings later...the swastika tattoo probably should have tipped them off.
      "It's going to be a maze!"
  • Sherlock:
    • In the third episode, "The Great Game", Holmes deduces that Molly's new boyfriend Jim is gay because of vague traces of make-up, subtle hints in his clothing, and slipping Sherlock his phone number. Jim helpfully provides the Smoking Gun himself so that Sherlock will miss the fact that his last name is Moriarty.
    • Played with in "The Blind Banker". Sherlock deduces that a banker has flown around the world twice very recently, and explains that he noticed his watch was set to the correct time, but the wrong date. He then adds that also, the banker's secretary told him explicitly. Watson later reveals, however, that the secretary told him no such thing, and Sherlock really did deduce it from the watch alone.
  • Surprisingly infrequent in Castle, where a complex series of deductions and circumstantial speculations lead to the killer. Since the police require proof beyond reasonable doubt, a last-minute smoking gun (or, sometimes, a cleverly extracted confession) is produced that seals the deal. But typically, solving the mystery points to an unexpected suspect or provides the clues necessary to establish probable cause so the police can get the evidence.
    • In "A Deadly Game", Castle and Beckett get the victim's lover, a Long Island housewife, to confess that she was having an affair. However, while a dramatic scene, the confession is unnecessary: they already have both the murder weapon and physical evidence putting the killer at the scene of the crime.
    • In "A Chill Runs Through Her Veins", Castle and Beckett identify the killer based on a chance conversation with a witness. They don't have any physical evidence or witnesses, so to close the case, the writers nicely have the killer volunteer a hypothetical confession so the viewer can feel satisfied that C&B have their man.
    • In "Famous Last Words", Castle must unravel the meaning of the lyrics for victim's final hit single to solve the murder. Only then can he and Beckett confront the killer and clear the name of the innocent suspect. Except...the key physical evidence was texts sent on the innocent suspect's phone, which were far more explicit about what actually happened than the song, and which the police were already going through. This evidence on its own identified and proved who the killer was, so the business with the song was only important because Castle and Beckett hadn't read the texts yet. Castle even mentions, "It's a good thing we subpoenaed your phone records when I had this crazy lyric idea," even though the lyrics had nothing to do with getting the phone records in the first place. It was mentioned that they were coming before he started combing through lyrics.
  • Dollhouse had a light, comical version. When Caroline first meets Bennett in college, she guesses Bennett is a neuroscience major. Bennett is shocked she guessed that so easily and asks how she figured it out. Caroline says it's because Bennett is eating a tuna sandwich, and fish is brain food...and also because Bennett is carrying a large stack of neuroscience textbooks.
  • Used in the Veep season 2 episode "The Vic Allen Dinner":
    Sue: You think I had a job interview?
    Dan: I know you had a job interview.
    Sue: How, Sherlock?
    Dan: Simple makeup, higher neckline. Flats don't go with that dress, which means you probably have heels in your bag. Coffee from corner bakery implying you were at one of the lobbying shops on 18th.
    Mike: I love this stuff.
    Dan: That and somebody called your extension to make sure you had the right address.
  • Barney Miller:
    • Barney played with this trope in one episode where Dietrich was investigating someone sending threatening letters to the Mayor of New York:
      Barney: So what do we have?
      Dietrich: So far...similar paper stock, the ink's the same...same return address.
      Barney: Why didn't you tell me that first?
      Dietrich: Dramatic effect.
    • Harris had caught a serial killer who was leaving bodies in garbage bags. He tells Barney how exhilarating it was following the clues, and "getting into the killer's mind".
      Barney: He left his wallet in one of the bags!
      Harris: Yeah, but I had to reach in and get it.
  • There's a short The Two Ronnies sketch in which Ronnie Barker plays a detective. He is given a pound note and proclaims that it's a counterfeit. When asked how he knew, he gives a series of very subtle clues that only someone with a trained eye would have been able to spot (like the letters being just a fraction of an inch lower than they should be, or the shading getting dark too fast)...then turns it over and points out that it says "Bank of Toyland" on the back.
  • Inverted in Brooklyn Nine-Nine when it is revealed to the audience that Captain Holt is gay, and has been out since the 1970s, yet the team of NYPD detectives now under his command missed all the clues. Some are more subtle, like certain mannerisms or the pride flag in his office. Others, like the framed article in his office with a picture of him and the headline "NYPD Appoints First Openly Gay Captain", less so.
  • On Gotham, Ed and Lucius attempt to identify the rooftop where someone launched an RPG. When they arrive at one, Lucius announces they're at the right spot. Ed agrees, complimenting the two of them on figuring out that this rooftop is the only one that has the correct angle to have hit the target. Lucius then points out that the empty RPG case is still on the roof.
  • In the season 3 premiere of The Big Bang Theory, Howard announces that Sheldon has run away providing the following evidence: he won't answer any calls, he quit his job and he sent a text to Howard saying "I'm running away".

  • In the Grand Finale of Cabin Pressure, Carolyn describes a picture in her office as being of a dogfight between two Spitfires. Martin points out one of the planes is not a Spitfire, citing the wings, fuselage, markings, and the fact that Spitfires didn't fight each other.

    Video Games 

    Web Comics 
  • The Order of the Stick
    • Used in this strip when Tarquin explains the reasons why he is sure Nale hasn't left the city after his latest scheme fell through: because Nale is a cautious planner and thus wouldn't leave the city without replacements for the men he lost, because Nale has a massive ego and thus wouldn't leave until he knew what Elan and Tarquin had to say about his stunt...and because Tarquin is wearing a ring of True Seeing and thus can see the invisible Nale standing right next to them. Cue massive Oh, Crap! from the latter.
      • This is one of the few examples not just played for laughs. It's easily inferred that Tarquin was using this time while talking, and feeding Nale's need to hear more about himself, to position himself to make a grab at Nale without Nale having an opportunity to run away. In other words, he was intentionally stalling with the earlier comments while moving into position. And perhaps also giving Nale a bit of a lecture on his egotism — it wouldn't be at all out of character for Tarquin to be doing two things at once.
  • An early Leftover Soup page has Jamie deducing Ellen is a Tauren World of Warcraft player. Her fridge magnets spell "Fuck the Alliance," her oven mitts and shakers have a cow pattern, and she hadn't logged out.

    Western Animation 
  • The Simpsons:
    • Used in episode "Homer the Vigilante":
      Abe: He was right under my nose the whole time. He lives in my retirement home. His name is Malloy.
      Lisa: Wow! How'd you track him down, Grampa?
      Abe: Good question! On one of my frequent trips to the ground, I noticed Malloy wore sneakers...for sneaking. My next clue came yesterday at the museum. We felt slighted by your age-bashing, and started home. Malloy said, "I'll catch up with you." [Malloy throws a grappling hook at the museum roof and starts climbing] I couldn't quite put my finger on it. There was something strange about the way he walked -- much more vertical than usual. And finally, Malloy, unlike most retired people, has the world's largest cubic zirconia on his coffee table.
    • In "Sunday, Cruddy Sunday", Wally's Superbowl tickets are revealed to be fakes because the hologram is missing, there's no such team as the Spungos, and they seem to be printed on some kind of cracker. Which is still edible.
  • The South Park episode "Not Without My Anus" opens with Terrance on trial for the murder of a Dr. O'Dwyer. The prosecutor, Scott, provides as evidence a piece of Terrance's shirt, the hammer used in the murder, and a haiku Terrance penned:note 
    Dr O'Dwyer
    Time to have your head smashed in
    with my new hammer.
  • In Teenage Mutant Ninja Turtles (2012), Mikey asks Donatello how he knew a Kraang substance was explosive. Donny gives a technobabble explanation about its molecular structure, which goes in one ear and out the other, before concluding by pointing to a Danger: Explosive sign on it.
  • In the My Little Pony: Friendship Is Magic episode "Rarity Investigates", Rarity accuses Wind Rider of framing Rainbow Dash based mostly on circumstantial evidence. Rarity admits later that she didn't have much of a case until she revealed the Smoking Gun, which was a stain linking him to a Delicious Distraction.
  • In the "Take My Life, Please" episode of The Life and Times of Juniper Lee, after June relinquishes her title to Ashley:
    Cletus: June! We got big trouble!
    Gus: A Racatan is barbecuing his way through the trolls' tree farm!
    June: Ah, Ashley will take care of it.
    Cletus:: A fifth-level incubus is about to release a demon from an interdimensional portal!
    June: Oh, that will take a week, she'll get to it. It's not a problem.
    Gus: And then there's the fuster troll.
    June: Okay, okay, now you guys are just acting girly. All they do is eat dandelions.
    Cletus: Ashley fed it a cookie.
    June: SHE FED IT A COOKIE?! You can't feed fuster trolls human food, or they -
    Gus: - grow thirty feet tall and everything they touch turns to stone?
    June: Uh! You guys could have mentioned that first!!
  • From the Grand Finale of Codename: Kids Next Door; the organization is taking part in a global scavenger hunt, and Numbuh One is being interviewed by a pair of rather snarky kid-reporters:
    First Reporter: Numbuh One, your team is in dead last. You've been spanked by Spankulot, yelled at by Numbuh 362, and embarrassed by her little brother.
    Numbuh One (annoyed): Is there a question in there?
    First Reporter: Indeed there is. The world is dying to know, will you go to Numbuh 363's funeral?
    Numbuh One: Wha...what do you mean?
    Second Reporter: Oh, haven't you heard? Numbuh 363 is going after the item worth the most points ever!
    Both Reporters: Father's pipe!!
  • She-Ra and the Princesses of Power: In "Reunion", Adora tracks Bow using broken twigs, sap on the trees, and his incredibly distinctive and obvious bootprints.
  • Mr. Peanutbutter, of all people, manages to do this twice in Bojack Horseman:
    • In "Our A-Story is a D-Story", he deduces that BoJack stole the D from the Hollywood sign by following a series of clues, using deduction, puzzle-solving skills, and forensics...and the fact that BoJack left him a drunk voicemail saying that he did it.
    • Then, in "Let's Find Out", he confronts BoJack about kissing Diane after their engagement. He claims to have found this out via security camera footage along the freeway, talking to his friends on the highway patrol, and she told him.
  • A variation in Futurama with Bender explaining why his mother never gave him The Talk: "She was a religious fundamentalist. Plus she didn't have a mouth." note 

    Real Life 
  • There is a quite famous anecdote about Doctor Joseph Bell who was supposedly the real life inspiration for Sherlock Holmes. When presented with a patient in front of his students he asked them to use deduction for finding the patient's problem. When nobody found it, he explained the process thus: use clues to make an assumption (red nose and pimples that would suggest alcoholism) and then support that theory with hard evidence (whereupon he pointed at a bottle of brandy in the patient's pocket).


Video Example(s):


Mr. Peanutbutter

BoJack asks Mr. Peanutbutter how he knew that BoJack kissed Diane.

How well does it match the trope?

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Example of:

Main / ClueEvidenceAndASmokingGun

Media sources:

Main / ClueEvidenceAndASmokingGun