2x07 They're everywhere

Charmed is a show about three estranged sisters named Prue (Shannen Doherty), Piper (Holly Marie Combs), and Phoebe (Alyssa Milano) who discover they come from a long line of powerful witches and are known to evil as The Charmed Ones. Despite being witches, they also have problems when it comes to love.
    Prue dated and was engaged to her former boss Roger (Matthew Ashford) until he told her that Phoebe came onto him. She called off their wedding, quit her job working for him, and went to another job at Buckland’s Auction House before becoming a photographer. Prue found...

Power Advancement in 2009

Season two episode Morality Bites led fans to believe Phoebe's third power was supposed to be electrokinesis or the ability to generate electricity. Although it has never been confimed it is often assumed that in that alternate future Phoebe shown in Morality Bites received the power of electrokinesis. However it is also theorized that the ability she used to kill Cal Greene with was actually an advancement of her empathy power, i.e. passing on harming emotions through the medium of electricity. This would explain why she snuck up on him and aimed for the brain rather...