Episode 107 of "Charmed"
s05e19 Nymphs Just Wanna Have Fun
Title: Nymphs Just Wanna Have Fun
Original Air Date: 04/20/2003 on WB
Director: Mel Damski
Writer: Andrea Stevens, Doug E. Jones
Guest Stars: Pat Healy (Xavier), Susan May Pratt (Miranda), Jason Lasater (Band Manager), D.J. Lockhart-Johnson (Officer #1), Jim O'Brien (Reporter), Todd Duffey (Satyr), Loudermilk (Themselves), Katherine Cunningham Eves (Daisy), Ruth Powell (Lily), Jaimz Woolvett (Tull), The Donnas (Themeselves (Uncredited))
Plot Outline:
When a demon attacks and kills one of the three nympths that protect a lake, the Charmed ones try to help. However, once the demon is destroyed, the nypmphs decide Paige should replace the fallen nymph, and they won't take no for an answer.