Charmed

As the sisters are getting closer and closer to each other, the city is erupting into violence. Piper spots an evil being presiding over a road rage disaster, but he gets away from her. She and her sisters hunt him down, but find he brought along three friends. They try to vanquish the four men, thinking they are anarchy demons, while the four men are trying to kill off the three witches, but instead one of the four men and Prue are sucked into a hole in the ground. Suddenly, good and evil have to work together to get back their missing collegue and their missing sister. They figure out who they opened a vortex to another dimension and how to reverse it. Meanwhile, Leo does some spying and figures out that the four men are actually the four horsemen of the apocalypse, and if Piper and Phoebe bring Prue back from the other dimension along with her apocalyptic friend, the world will end at 7pm. Piper and Phoebe decide they want Prue back anyway, but at the last minute Phoebe has a vision of the end of the world and she and Piper don't go through with it. Due to this selfless act, the sisters prove that there is still some good in the world, and the Source kills off the horsemen. Piper and Phoebe use the opportunity to get Prue back.