Which episode do they find out chrisy's evil in charmed?

In the TV series "Charmed," the character Christy is revealed to have evil intentions in Season 8, Episode 14, titled "The Last Temptation of Christy." In this episode, the sisters discover that Christy has been manipulated and is working with the Triad to bring about dark plans against them. The revelation of her true nature creates significant tension and conflict within the storyline.