fringe eleventh episode season american science fiction drama television series fringe 54th episode overall episode fringe division follows chain murders assembly device completion guest starred executive producer wrote seventh credit series fringe directional credit served director episode aired united_states january estimated million viewers making highest rated program night television critics generally viewed episode positively number praising reveal killer identity plot fringe division visits secured massive dynamic facility prime universe version device believed artifact people assembled company trying use books people including sought collected understand workings device aware departure olivia parallel universe stole component unit possibly power source find way engage device peter device moving new configuration sending electromagnetic peter suddenly peter returns olivia walter massive dynamic undergo tests cause device activation asks review files pulled computer hidden messages wishing olivia peter forced learn wrote day corpse found shot head data disc information mission missing identity connects employees facility fringe housed suspects mole seeking data orders humanity key people fbi massive dynamic identifies potential candidates including doctor massive dynamic left time fringe division reaches home find man dead olivia returns lab convinces let review notes believing think like missed eventually comes identify based childhood olive identifies newton slain killed fringe begins descend residence walter having thought peter returned massive dynamic tests learns walter enters room finding printed pages notes including names olivia identified walter arrives home final peter finishes killing peter tries justify actions longer wanting situation learn goal peter walter depart fringe team arrives walter device activated peter steps fears peter attempt production executive producer responsible writing seventh credit series episode directed directional credit series episode featured time guest roles actors reprised role massive dynamic scientist premise story editor noted science fiction simply need source conflict ends science technology source evil happens lot fringe think flip coin fringe science ends able save day machine episode based rendered cgi parallel universe revealed season finale viewers debated nicknames featured double parallel universe matter contention nicknames included believed critics resolved character refers fringe episodes fox released science lesson plan collaboration grade school children focusing science seen intention having students learn classification blood blood types based molecules surface red blood cells reception ratings second episode air friday united_states initial broadcast january maintained similar numbers viewers previous episode share estimated million viewers concern fringe aired supernatural similar science fiction theme network decided episode following week aired opposite fringe episode concentrate ask broadcast news programs rival networks highest rated program night tied nbc ratings prevent fox network placing fourth total viewers time shifting devices taken account episode watched estimated million week initial broadcast reviews reviews episode television critics generally positive ken_tucker entertainment_weekly enjoyed scenes set thought episode good job audience thinking peter responsible killings loving previous week episode los_angeles_times thought aspects fringe loved particularly loved opening minutes like tucker surprised peter murders graded explaining despite awe inspiring opening reminded film close encounters kind final revelations murray found episode solid largely thought investigation lacked certain found peter olivia relationship scenes drag contributor believed episode got quickly track week lackluster tale called killer revelation greatest shock received series far continued favorite parts peter killer arc able watch emotional setbacks facing result betrayal called good characterization excellent acting questioned massive dynamic build machine known destroyer mankind ign columnist praised writing staff think stuck old habits come new ideas new perspective old storylines characters continued isn groundbreaking episode series try number new ideas gives big new plot point change tone rest season
Reciprocity (Fringe)