The Aaron Spelling-produced television series CHARMED follows the adventures of three modern-day witches juggling their supernatural abilities with the demands of everyday life. The Halliwell sisters, Phoebe (Alyssa Milano) and Piper (Holly Marie Combs), use their magical powers to protect innocent people from demons while struggling to rise above the childish bickering of sisterhood to work together as a team. This collection presents all 21 episodes of the series' fourth season, which introduces Rose McGowan as the Halliwells' half-sister, Paige, after the departure of original cast member Shannon Doherty at the end of Season Three.