One of the very first classic episodes of Charmed, Wicca Envy sees the end of gruesome twosome Rex and Hannah and introduces the biggest evil the Charmed Ones ever battled... The Source.
Wicca Envy sees Rex and Hannah framing Prue for the theft of a priceless tiara from Buckland's and the murder of a guard. Prue is arrested and it's up to Piper and Phoebe to release Prue from jail and to kill the two warlocks who framed her. Rex blackmails the sisters into giving up their powers for Prue's release.
This is the first "apocalyptic" episode of Charmed and features some shocking twists and turns and sets up many exciting storylines for the rest of the season. The motives behind Rex and Hannah's crimes are well played and it was quite original to see demons resorting to blackmail instead of just random carnage. Wicca Envy also sees a big reveal in Leo, who we discover is a Whitelighter. Though he doesn't do much magic in this episode, he is able to restore the sister's powers without them knowing.
The big fight at the end was well written and I loved Hannah shapeshifting into a panther. I also loved the sisters causing Rex to be eaten alive. Shannen Doherty was brilliant in this episode and conveyed her dilemma very well. The scene where Piper desperately tries to hide the stolen tiara was pure slapstick and her freezing power came in extremely handy.
Wicca Envy is an excellent episode of Charmed which puts the sisters in real peril. Compared to the later seasons, you genuinely worry for the Charmed Ones, something which hasn't been seen in the new episodes.