Charmed Season 6 Episode 10

Piper: What's the problem? Leo: He's not healing. Something is draining his powers and blocking mine. Its like a virus.
Piper: A virus named Bianca.
Phoebe: You think she did this? Piper: Its gotta be. Paige: Yeah, but it doesn't explain why she would come back from the future just to kill him. Piper: Well, somebody had to of sent her. She's a hired gun. Phoebe: Well, we've gotta find her to save him. Figure out what she did. (Sound of Phoebe picking up Chris' emotions.) Wow.
Leo: What is it?
Phoebe: Oh, my God. He loves her.
Paige: Loves who? Bianca? Phoebe: Yeah. She broke his heart. (Phoebe sees that Chris is holding something in his hand. She takes it from him and holds it up.) Engagement ring.
Paige: Obviously an acrimonious split.