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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 4
HD
Overview:
When stopped off on a planet, Rygel leaves the rest of the group and is caught in an unbreakable orange substance while stealing treasures he discovers in a cave. When D’Argo, Crichton and Noranti go looking for him, the cave seals them in. Two huge grunts appear who have protective armor which protects them from weapons fires.