Ep 16. Farscape: S3 E16 - Revenging Angel

John Crichton, the human astronaut, discovers a mysterious gemstone on a planet of the Uncharted Territories. However, a group of space pirates called the Zenetan Pirates kidnapped him and forced him to reveal the source of the gemstone. After the pirates get what they want, they leave Crichton stranded on a desolate planet that is inhabited by a group of beings called the Tavyans. Here, he is plagued by an Evil Dead-style encounter with a creature that possesses the body of his friend and shipmate, Chiana. Crichton must use all his human wits to defeat the creature, escape the planet, and prevent the pirates from using the gemstone for their evil plot.