Charmed (1998): Season 5, Episode 19 - ProjectFreeTV

5 - 19: Nymphs Just Wanna Have Fun

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.