Episode 70 of "Farscape"
s04e04 Lava's A Many Splendored Thing
Title: Lava's A Many Splendored Thing
Original Air Date: 06/28/2002 on Sci-Fi Channel
Plot Outline:
Whilst stopped off on a planet, Rygel leaves the rest of the group and is caught in unbreakable orange substance whilst 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 armer which protects them from weapons fires.
