'''Basic Trope''': When the least likely character to be the {{Big Bad}} or {{The Man Behind the Man}}, is.
* '''Straight''': Detective Bob finds out that Carl the car dealership owner, who sold him a car earlier, is the Mafia boss he had been tracking.
* '''Exaggerated''': Detective Bob, after investigating several crime lords and shady politicians, find out that his wife Alice's dog, Fido, is the Mafia boss.
* '''Downplayed''': Detective Bob discovers that Alice herself was behind the crime he's investigating. This shocks him (and the audience) at first, but since Alice was a {{Jerkass}} in the first place, it all makes sense.
* '''Justified''': Carl takes on a normal job, which has no connection to crime, so he would never be suspected.
* '''Inverted''':
** Detective Bob suspected Carl from the start, [[ProperlyParanoid even without any reason to.]]
** Carl is revealed to be the story's BigGood all along.
** Bob is revealed that [[TomatoInTheMirror he was the Mafia boss]] himself!
* '''Subverted''': Carl the car dealership owner is a former mafia boss under the Witness Protection Program.
* '''Double Subverted''':
** ...Who is actually a detective, investigating the true {{Man Behind the Man}}.
** Carl supposedly proves his innocence to Bob, then it is revealed that he had been pulling the strings all along.
* '''Parodied''': Fido enjoys seeing Detective Bob not suspecting him, just because he is a dog. But it's just a ruse so he could take over the world [[UnwittingPawn once all of the suspects (who are his greatest enemies) are arrested.]]
* '''Zig Zagged''': The man did it, but wait, he was really behind TheDragon, but TheDragon was really the man behind the mastermind...
* '''Averted''': The {{Man Behind the Man}} is just one of the suspects or some other likely person, not the least likely person.
* '''Enforced''': "Hey, how about we make the criminals Carl, the car dealership owner? The readers won't ever find out."
* '''Lampshaded''': "Carl, you're the Mafia boss? How sneaky of you for adopting that ruse,"
* '''Invoked''': Carl becomes a car dealership owner so he could become a Mafia boss without anybody knowing.
* '''Exploited''': Since Fido knows that no one will ever suspect him as being a serial killer, he becomes one and frame people left and right, warding detectives off the right path.
* '''Defied''': Detective Bob refuses to believe that the least likely suspect is the criminal, and Carl doesn't adopt such a silly cover job.
* '''Discussed''': "Hey, it's probably the dog who did it all, because he knew we wouldn't suspect him." "The dog? Seriously? [[YouWatchTooMuchX You've been reading too many cheap mystery thrillers lately.]]" [[GilliganCut Cut]] to a scene where Fido makes a SarcasticConfession.
* '''Conversed''': "This such a predictable movie... Wait a minute! What just happened? ''Carl'' was behind it all? Why? It doesn't make any sense!"
* '''Deconstructed''': Fido really was the mastermind, but because he didn't plan ahead, Fido panics and reveals himself out of guilt.
* '''Reconstructed''': But since Detective Bob thinks that Fido is innocent (as he's just a dog), Fido gets to continue his {{Evil Plan}} scot-free.
* '''Played For Laughs''': It's ''really freaking obvious'' that Carl is a Mafia boss putting up a ruse as a car dealership owner, but HilarityEnsues [[WhatAnIdiot when Bob]] ''outright refuses'' [[WhatAnIdiot to acknowledge that, even when the evidence is]] ''right in front of him!''
* '''Played For Drama''': Fido successfully pulls off his EvilPlan, but he wasn't CrazyPrepared enough when he's revealed to be the mastermind. His crimes gets him 260 different life sentences.
Wait, the link called, {{The Dog Is the Mastermind}} is the mastermind!
%% Optional items, added after Conversed, at your discretion:
%%* '''Implied''': ???
%%* '''Plotted A Good Waste''': ???