Ep 3. Cheaper by the Coven

Charmed season 7 episode 3, titled "Cheaper by the Coven," follows the sisters as they struggle to come to terms with their newest Whitelighter, Leo's undercover mission to gather information on the Avatars. Meanwhile, Piper and Phoebe find themselves at odds with Paige over their latest charge - a powerful young witch named Billie.

When the sisters first meet Billie, they quickly realize that she possesses a great deal of power and potential, but also fear that she may not be ready to handle it. Despite Paige's urging to give Billie a chance, Piper and Phoebe remain skeptical. Meanwhile, Leo is busy gathering intel on the Avatars, a mysterious group that claims to hold the key to world peace.

As Leo continues to delve deeper into the Avatar's activities, he begins to experience doubts about his mission. He confides in Piper, who is shocked to learn the truth about what he's been asked to do. Meanwhile, Paige becomes increasingly frustrated with her sisters' lack of faith in Billie, and decides to take matters into her own hands.

When Billie is kidnapped by a group of demons, Paige risks everything to rescue her. Against all odds, she manages to defeat the demons and free Billie, earning her sisters' respect and admiration in the process. However, as the sisters celebrate their victory, Leo receives devastating news - his cover has been blown, and the Avatars are coming for him.

As the episode comes to a close, the sisters find themselves in a race against time to save Leo from the Avatars, while also grappling with their own inner demons and insecurities. Can they come together as a coven and overcome the obstacles that lie in their path, or will the forces of evil finally triumph over them? Only time will tell in this thrilling episode of Charmed.