'''Season 1, Episode 7''':
!Witness

->'''Scarface''': Boss, it's done.\\
'''Elias''': [[ItHasOnlyJustBegun Nah, it's just beginning]]. "Veni, vidi, vici."

Carter and Fusco investigate a mob killing at a bodega in Brighton Beach, where the dominance of the Russian Mob is being challenged by [[DiabolicalMastermind a smart and secretive new player]] in the New York crime world: Carl Elias. The victim is one of Elias' lieutenants (no one knows what Elias himself looks like), and through security footage the police learn there was a witness to the killing, a local schoolteacher named Charlie Burton, who may have been privy to the victim's dying declaration. Fusco calls Reese to alert him that Burton is in danger, but Reese and Finch are already watching him, having been given his number by the Machine. The Russians show up, ostensibly to kill a witness, and Reese tries to get him to safety; Charlie takes a bullet to the shoulder, as does Reese's phone, and the two are forced to seek refuge in a slum tower controlled by Bulgiarian drug dealers.

Finch makes contact with Fusco and enlists his help in tracking down Reese, while Carter investigates the Russian Mob and Elias' crew to find the shooters and call off both sides' hunt for Charlie. The wife of the dead lieutenant claims that Brighton Beach is just the start: Elias plans to wipe out the foreign gangs, reunite the Five Families and bring New York under his heel. What's more, he's smart and ruthless enough to do it, and the fact that no one knows what he looks like means the Russians can't strike back. Meanwhile, Reese patches up Charlie's bullet wound and tries to convince him to testify to the police. Charlie refuses; he doesn't want to risk the wrath of the Russians, or leave the school where he's worked so hard to help the impoverished students, many of whom are mobsters' children, to get out of the mob life. And the Russians negotiate with the Bulgiarians and are allowed to enter the slums and hunt for Reese and Charlie, who only escape thanks to one of Charlie's students. They take one of the Russians hostage, call in an anonymous tip to Carter and make it to the ferry, fleeing towards Manhattan.

Finch sends Fusco to meet the ferry and take custody of Charlie, only to then intercept communications between Elias' men alerting them to the ferry's arrival. He suspects Fusco of betraying them, but Fusco is knocked out by "Scarface", one of Elias' goons. Carter picks up the Russian shooters and interrogates their leader, who enlightens the NYPD to what's really been happening: the Russians haven't been going to so much effort to kill a mere ''witness''. On the ferry, Reese realises the truth, but it's too late to stop Charlie from drawing a gun and taking him prisoner, revealing himself as Carl Elias. As the ferry reaches the dock, he forces Reese to tie himself up, letting him live out of gratitude for saving his life. By the time Finch arrives to revive Fusco, Elias is gone. Reese blames himself for saving the life of a killer, wondering how many more numbers the Machine will spit out because of Elias. In the coda, Scarface kills the head of the Russian Mob in Brighton Beach, and Elias declares that "it's just beginning."

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!!Tropes present in this episode include
* ActorAllusion: One of Charlie's students is reading ''Literature/TheCountOfMonteCristo''. Jim Caviezel starred in the [[Film/TheCountOfMonteCristo 2002 film version]].
* BewareTheQuietOnes: Elias seems like a genuinely nice schoolteacher, even though he's started a bloody gang war and has no problems kneecapping Russian mobsters.
* CrowningMusicOfAwesome: Nina Simons's "Sinnerman" over the final scenes.
* TheDogWasTheMastermind: The witness is one of the most dangerous criminal masterminds of the lot.
* [[KingIncognito Don Incognito]]: So incognito, the Russian Mob didn't realise that the head of the gang trying to take them out ''was their children's English teacher''.
* EvenEvilHasStandards: Elias' reason for leaving Reese alive. He wouldn't want to seem "ungrateful".
* GrowingTheBeard: Some feel the series really hit its stride with this episode.
* HeKnowsTooMuch: Reese, Finch, Carter and the NYPD ''think'' this is why the Russians are after Charlie, to stop him testifying to what he saw in the bodega.
* HeyItsThatGuy: Looks like [[Series/VeronicaMars Keith Mars]] decided to work on the other side of the law.
* HiddenVillain: Charlie Burton, ''aka'' Elias.
* ItHasOnlyJustBegun: Elias' war.
* KarmaHoudini: Other than having his SecretIdentity blown, Elias gets off scot-free at the end.
* TheMafiya: The episode centers around the start of a war between families.
* NiceJobBreakingItHero: Reese ended up saving one of the most dangerous men in the city.
* NotSoDifferent: Reese compares "Charlie" to Finch. The comparisons only get more apt once we discover his true identity.
* MyGodWhatHaveIDone: Finch and Reese feel this way after realizing they just saved a man that is most likely going to be the cause of a lot more future numbers.
* ProphecyTwist: "Charlie Burton" really was in danger, but it turns out he's a far more dangerous figure and saving him will put other lives in jeopardy.
** And remember, the Machine spits out the names of people who are connected-- they can be victims or perpetrators. This guy happened to be ''both'' so it's no wonder his number came up.
* TheReveal: On two seperate fronts, it's revealed that mild-mannered schoolteacher Charlie Burton is really brutal crime boss Carl Elias.
* SaveTheVillain: Reese unwittingly saves one of the bloodiest new crime figures in New York from being taken out by the competition.
* ShoutOut: After trying to figure out who Elias is for the whole episode, Reese discovers too late it's the nebbish, helpless character who's been in his grasp the whole time. [[Film/TheUsualSuspects Sound familiar?]]
* StockEpisodeTitles: At least 90 other episodes have this title.
* TwoAliasesOneCharacter
* WeCanRuleTogether: Elias offers Reece a job in his organisation. One can't help wondering if Reece would have taken such an offer prior to Finch finding him.
* WhamEpisode: The series' first.
* WhamLine
-->''You really think we'd go to this much trouble for a witness?''

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