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Unreasonable Doubt is the second episode of the third season of FBI, and the forty-third episode overall.
Guest Stars: Josh Segarra (Special Agent Nestor Vertiz), Kathleen Munroe (Rina Trenholm), James Chen (Ian Lim), Vedette Lim (Elise Taylor), Taylor Anthony Miller (Kelly Moran), Ari Fliakos (Cory McMay), Erin Gann (Oren Tate)
with Joshua Morgan (Peter Deleon), Pierre Jean Gonzalez (Ben Santos), Meredith Handerhan (Taryn McMay), Karen Christie-Ward (Westchester PD Officer Collins), David North (Kenneth Higby), David Lee Huynh (Westchester PD Officer), Sam Poon (Teen One), Aaron Vargas (Teen Two), Andrew Scott May (Sous Chef), Zakiya Cook (Angela)
The team races to stop an active serial killer after three women are found weighted down at the bottom of a lake, and Jubal looks into an old closed case after there are multiple similarities to the recent victims.