Charmed season 1 episode 18
Episode title: The Replacement
When Harry mysteriously disappears, a substitute Whitelighter, Tessa, surprises the sisters. With Galvin's return imminent, Macy knows she must tell him her decision about her demon side. Niko is curious when she sees that the Sarcana has cleared out and calls Mel for clarity, but when Mel arrives she is alarmed at what she discovers. Meanwhile, Maggie is trying to figure out how she can pay for college and turns to Macy for guidance.
