Three evil sisters steal the powers and identities of the Charmed Ones, and the real Piper, Phoebe, and Paige must convince Chris of what happened. Meanwhile, Leo continues to search for answers about who sent him to Valhalla, and Piper realizes that Wyatt needs more time with his dad.
Sydney and Vaughn are brought back together to prevent Sark from destroying the nation's satellite communication systems. Also, Sydney has to accompany Vaughn and Lauren to see Sloane.
A serial rapist sends a letter to the squad announcing his return to Philadelphia after five years and his plan to strike again. Lilly's best hope of catching the rapist comes from a victim who is able to provide a composite sketch.
The carnival finally arrives in Babylon, a tapped-out silver mining town in rural Texas with few inhabitants. Samson tries to improve the troupe's spirits with a night of revelry at the local bar while Sofie and Libby (one of the chooch dancers) get closer and decide to attend the local cinema. Eventually, a group of restless miners arrive in time for the chooch show, but with drastic consequences when they start a riot. Meanwhile, Ben has an enlightening experience at the bottom of a mineshaft where he has a vision of the mysterious Scudder fighting in the trenches of World War I.
