'Once in a Blue Moon' (Story Code 4301140) by Debra Fisher and Erica Messer

When the blue moon causes the Charmed Ones to transform into beasts, their new Whitelighter is nearly killed….

Holly Marie Combs (Piper Halliwell), Alyssa Milano (Phoebe Halliwell), Rose McGowan (Paige Matthews), Brian Krause (Leo Wyatt), Dorian Gregory (Inspector Darryl Morris), Jason and Kristopher Simmons (Wyatt Halliwell), Nick Lachey (Leslie St. Claire), Kerr Smith (Agent Kyle Brody), Todd Tucker (Head Demon), Joel Swetow (Avatar Alpha), Patrice Fisher (Avatar Beta), Ian Anthony Dale (Avatar Gamma), John de Lancie (Odin), John Ross Bowie (Wimpy Whitelighter), T.J. Thyne (Danny), Treva Etienne (Possessor Demon)

Directed by John T. Kretchmer
Produced by Holly Marie Combs, Alyssa Milano and Jon Pare
Executive Producers Brad Kern, Aaron Spelling and E. Duke Vincent

TX (US): 17th October 2004

Notes:
*Featuring Piper Halliwell, Phoebe Halliwell, Paige Matthews and Leo Wyatt