Season 4, Episode 6 Natural Election

First Aired: July 19, 2002

Crichton's efforts to reconcile with Aeryn are put on hold when he makes a breakthrough in his wormhole research and Moya is threatened by a parasite. Aeryn: Claudia Black. D'Argo: Anthony Simcoe. Sikozu: Raelee Hill. Crichton: Ben Browder.

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