Watch FBI Online: Season 5 Episode 4Paul Dailly at .
Did OA make the biggest mistake of his career?
On FBI Season 5 Episode 4, a series of brutal assaults left the detectives in danger.
OA lied about his own attack.
Meanwhile, NYPD Detective Chavez appeared on the scene, offering some surprising intel.
Elsewhere, Jubal was still reeling from the events of the school shooting and tried to press on.
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.