Plot summary
Reese goes undercover as Finch's asset manager at a Wall Street investment firm to monitor their latest number, trader Adam Saunders. Adam had advised his adoptive uncle to invest heavily in a firm known as Tritak, but has since noticed suspicious activity, putting his life in danger. Reese learns that Adam's co-worker, along with an SEC employee monitoring him, are engaged in insider trading, hoping to short the soon-to-fail Tritak and defraud thousands of people out of millions of dollars. Reese saves Adam from being assassinated while Finch uses his unlimited funds to keep Tritak financially afloat. Carter deduces that the true mastermind behind the plot is Carl Elias while Reese gains possession of a burner phone that he can use to contact Elias in the future.
Credits
Adapted from Wikipedia contributors, Person of Interest season 1. HTML formatting and reference markers removed.