Finale of Charmed with Rose McGowan hinted at
Sci Fi Wire -- The News Service of the Sci Fi Channel: "Conway said that Gideon makes use of a mirror-like device to open a window to a parallel dimension, an evil version of our world. 'In the parallel dimension, there's an evil version of the Charmed Ones [Combs, Alyssa Milano and Rose McGowan]. There's an evil version of him, and the world is all evil,' Conway said while lining up shots for a confrontation between Gideon and Leo (Brian Krause). 'Our girls are inadvertently sent over there, and they have to escape. The only way they can escape that world is by doing a lot of good.'"