in several episodes throughout the series, mostly notably the season three episode "Power Outage", when the sisters lose their powers after using them against each other during an argument, only regaining them once they reconcile. Halliwell sisters The "Power of Three" originally included Prue (Shannen Doherty), Piper (Holly Marie Combs), and Phoebe Halliwell (Alyssa Milano). The Halliwell sisters are also known as The Charmed Ones, said to be the most powerful witches ever known. In addition to their combined "Power of Three", each sister has individual powers; the eldest Prue initially receives the ability to move objects with her mind by channeling telekinesis through her eyes, later through hands, middle sister Piper initially receives the power of molecular immobilization, but referred to as "freezing" people and objects in time, and the youngest Phoebe initially has the power of premonition, enabling her to see into the future and the past. The sisters use their powers to protect innocent lives and vanquish various demons and warlocks, often invoking their joint "Power of Three" to defeat their enemies. Their magic is rooted in their bond as sisters and as a family. Each sister's powers grow and evolve as the series progresses to the point where they also develop new ones. Prue eventually channels her telekinesis through her hands and gains the power of astral projection in season two, while in season three, Piper gains the ability of molecular combustion, which gives her the ability to cause objects or evil beings to spontaneously explode, and Phoebe gains the power to levitate. As these new powers appear, their joint "Power of Three" also appears to strengthen. Following Prue's death in the season three finale "All Hell Breaks Loose", Piper and Phoebe discover that they have a long-lost younger half-sister, Paige Matthews (Rose McGowan), at the beginning of season four. Paige then goes on to help reconstitute The Charmed Ones by taking Prue's place in the "Power of Three". This is made possible after it is revealed that she is the daughter of the Halliwell sisters' mother Patty (Finola Hughes) and her Whitelighter Sam Wilder (Scott Jaeck). Paige was given up at birth to protect her from the wrath of The Elders if they were to discover her Whitelighter heritage. Paige's magical abilities represent her dual heritage as both a witch and whitelighter; like Prue, she possesses a form of telekinesis, but she has to verbally