Reciprocity (Fringe)

"Reciprocity"
Fringe episode
The assembled machine under study by Massive Dynamic and Fringe Division scientists
Episode no.	Season 3 Episode 11
Directed by	Jeannot Szwarc
Written by	Josh Singer
Production code	3X6111
Original air date	January 28, 2011 (2011-01-28)
Guest appearances
Ryan McDonald as Brandon Fayette Charles Parnell as Dr. James Falcon Sean Campbell as Zach Alpert Noah Beggs as Lt. Pike Hector Johnson as PFC Tomforde Brett Delaney as Agent Goldin Paula Giroday as Agent Ruiz
Episode chronology
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Fringe season 3
List of episodes

"Reciprocity" is the eleventh episode of the third season of the American science fiction drama television series Fringe, and the 54th episode overall. In the episode, the Fringe division follows a chain of shapeshifter murders as the assembly of the doomsday device nears completion. Ryan McDonald and Charles Parnell guest starred.

Co-executive producer Josh Singer wrote "Reciprocity", his seventh such credit for the series. For his third Fringe directional credit, Jeannot Szwarc served as the director. The episode first aired in the United States on January 28, 2011 to an estimated 4.57 million viewers, making it the highest rated program of the night. Television critics generally viewed the episode positively, with a number praising the revelation of the shapeshifter killer's identity.