History Recap / PersonOfInterestS04E19

* CoolGuns: Reese uses the Nemesis Arms Vanquish take-down sniper rifle to destroy some perimeter cameras. Once they get into the sever room, he puts it aside in favour of a scoped M4 carbine.

* HeroesWantRedheads: Zoe says that she thought John would avert this, and was surprised [[Recap/PersonOfInterestS04E18 he was beginning a relationship with Iris]].

* EveryManHasHisPrice: Samaritan gives $50,000 to an inmate, and promises another $50,000 to kill Khan.

* ExactWords: A surprisingly brutal one. Khan demanded that Greer allow him to look into the eyes of "God" (Samaritan). Greer obliges him with a quick shot to the chest with his Walther PPK. Then as the blood drains out of Khan, Samaritan shows all the surveillance it's been doing on him, the footage reflected in the man's lifeless eyes.

* TheJeeves: Khan's assistant, who stays with him even when his wife, company, best friend, [[ArsonMurderAndJaywalking and lawyers]] leave him.

** During the flashbacks in "The Cold War" focusing on the end of his career at MI6, Greer carried a [[Franchise/JamesBond Walther PPK]]. He breaks another one out in this episode to murder Khan.

* HonorBeforeReason: Even though Samaritan is involved, Reese still insists on protecting him, though it could blow their cover.

** Averted with, ironically enough, The Machine itself. Samaritan couldn't find The Machine on any networked device running Khan's software anywhere in the world. This disproves the popular fan theory that The Machine is running on regular people's personal devices and all but confirms that [[Recap/PersonOfInterestS02E22 the servers "Ernest Thornhill" had moved from Hanford, Washington]] are still active. [[Recap/PersonOfInterestS04E22 A few episodes later]], we learn that The Machine is actually living decentralized within the U.S. power grid.

** Averted with, ironically enough, The Machine itself. Samaritan couldn't find The Machine on any networked device running Khan's software anywhere in the world. This disproves the popular fan theory that The Machine is running on regular people's personal devices and all but confirms that [[Recap/PersonOfInterestS02E22 the servers "Ernest Thornhill" had moved from Hanford, Washington]] are still active. [[Recap/PersonOfInterestS04E22 A few episodes later,]] we learn that The Machine is actually living decentralized within the U.S. power grid.

** [[AC:Threat Eliminated]].

* HonorBeforeReason: Even though Samaritan is involved, Reese still insists on protecting him, though it could blow their cover.

* MadeOfIndestructium: The briefcase Root steals.

* NoKillLikeOverkill: Invoked when Root adds C4 explosive to an SUV-load of weapons.

* PreemptiveDeclaration: Root tells the waiter to lie down. [[KnockoutGas He falls down instead]].

* ShaggyDogStory: The B-plot with the briefcase. Root gasses a restaurant to steal it, tries to no avail to break into it, and eventually the Machine has to text her the combination. The only thing in the briefcase is a Fabergé egg, [[CrowningMomentOfFunny which Root then throws against the wall, shattering it]]. [[BaitAndSwitch The briefcase itself was the item of value all along]].

* YouKnowTooMuch: Khan is removed from control of his company because he stumbles across Samaritan's secret use of his software. When he deduces an AI is behind things, Samaritan decides to kill him.

* BatmanGrabsAGun: Averted by Finch, who is repeatedly offered a gun and firearms training by Reese, but refuses:

* TheDeterminator: Khan, which eventually causes his death, as Samaritan knows he won't give up until he has answers.

** Averted with, ironically enough, The Machine itself. Samaritan couldn't find The Machine on any networked device running Khan's software anywhere in the world. This disproves the popular fan theory that The Machine is running on regular people's personal devices and all but confirms that [[Recap/PersonOfInterests02e22 the servers "Ernest Thornhill" had moved from Hanford, Washington]] are still active.

** THREAT ELIMINATED.

* ForgottenPhlebotinum: Saul never got to use his gun.

* IncrediblyObviousTail: Khan eyes Reese suspiciously in the bar, and recognises him after Reese springs him from prison. Naturally he assumes Reese is working for his enemies.

--> '''Greer:''' Very well.
* PricelessMingVase: Root finally opens the briefcase to reveal a Faberge egg. On the instructions of the Machine, she smashes it and stores the briefcase instead.

* ScrewThisImOutOfHere:

* ThrowAwayGuns: Reese leaves behind his sniper rifle (though he's got plenty of guns in the trunk). Root and Martine throw aside their guns for the satisfaction of pounding each other.
* TrackingDevice: There's one in the briefcase, and Root has to short it out using a lamp. Unfortunately the former owners are already kicking down the door.

* WhamEpisode: We find out that Samaritan is using Khan's antivirus software to search for the Machine. Greer says that the Machine's not on any networked device, but Finch says it's a matter of time until it succeeds.

** ''Samaritan'' plays this straight. When Reese shoots the cameras, its first instinct is to send for maintenance.
*** Though Samaritan mooks led by Martine quickly appear, so presumably it was just being practical -- someone has to fix the cameras, right?
* YouHaveToBelieveMe: Khan to Mark Lee. Later he's surprised when Team Machine does believe him.

** Averted with the untraceable firearm Khan gets from his loyal assistant. Contrary to Chekhov's dictum, it never gets fired.
** Likewise the C4 explosive Root insists on bringing.