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Season 1 - Mar. 19, 1999
Season 2 - Mar. 17, 2000
Season 3 - Mar. 16, 2001
Season 4 - Jun. 06, 2002

Farscape Season 4 Episode 1
HD
Overview:
Crichton, now aboard a dying leviathan named Elack, encounters an alien named Sikozu who aids him in stopping the Grudeks who are intent on obtaining toubray (Leviathan neural cluster tissue).