Person of Interest/Recap/S01/E06

Season 1, Episode 6:

The Fix
The latest person of interest is Zoe Morgan, a "fixer" who knows a lot of New York's power players and can solve problems for a price. Posing as her driver, Reese gets close enough to intervene when representatives of a pharmacutical company try to kill her after she delivers a sensitive recording. Zoe disappears, and Reese and Finch try to track her down while unravelling the mystery behind the recording, which incriminates the company in a murder and a pharmacutical scam.

Meanwhile, Detective Carter investigates the murder of a retired Mafia hitman who was once the prime suspect in the murder of Marlene Elias -- the case files of which were stolen in "Mission Creep". Marlene was once the lover of Don Gianni Moretti and he was suspected of ordering her murder, which was carried out with a kitchen knife; the same knife, stolen from evidence, was used to kill the hitman. Carter suspects that the killer is Moretti and Marlene's illegitimate child, Carl Elias, and enlists the help of the original investigating officer to find out. Later, when Carter visits the officer's apartment, she finds him dead and chases a shadowy figure from the scene.

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Tropes present in this episode include

 * Corrupt Corporate Executive
 * Femme Fatale: Zoe Morgan.
 * The Ghost: Elias.
 * Roaring Rampage of Revenge: Carter suspects that Elias is on one.
 * Working Title: "Killing Zoe", before changing it to "The Fix".