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In this first episode of a pivotal two-part Farscape story, Aeryn has suffered stab wounds, requiring an emergency tissue graft. To expedite this operation, Crichton (Ben Browder) disguises himself as a PeaceKeeper captain, and in the company of Chiana (Gigi Edgley) he infiltrates the PK's Gammak Base. Upon his arrival, Crichton again crosses the path of sympathetic PK tech girl Gilliana (Alyssa-Jane Cook) -- and also makes first contact with the evil hybrid scientist, Scorpius (Wayne Pygram). The climax finds Crichton subjected to the Aurora Chair, which opens the floodgates of his memory -- a potentially disastrous turn of events for Moya and her crew. Originally telecast January 7, 2000, "Nerve" was followed one week later by the concluding chapter "The Hidden Memory."