TV Guide-The Halliwells face their most deadly, powerful challenge to date: the Four Horsemen of the Apocalypse. Circumstances force the sisters into an alliance with the super-demons after one of the Horsemen and Prue are sucked into another dimension.
TV Tome-When a vanquishing spell goes awry while the Halliwells try to destroy the 4 Horsemen of the Apocalypse, Prue and one of the Horsemen become trapped in a vortex. Piper and Phoebe enlist the help of the three remaining Horsemen to free Prue and the fourth Horseman before the vortex closes, and both are killed.
