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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 12
HD
Overview:
After accidentally returning to Earth, Crichton discovers it he is in 1985 and he has altered the time line, causing his father to be scheduled to fly on the doomed shuttle ‘Challenger’.