In the first part of Charmed's season-six finale (originally telecast as a single two-part episode), Gideon (Gildart Jackson) makes a last-ditch effort to destroy baby Wyatt. Gideon's scheme involves exiling father-and-son Whitelighters Leo (Brian Krause) and Chris (Drew Fuller) to a bizarre mirror world where evil is good and vice versa. Phoebe (Alyssa Milano) and Paige (Rose McGowan) had better hurry in their rescue efforts: if Chris does not return in time for his "past self" to be born to Piper (Holly Marie Combs), the space-time continuum will be damaged beyond repair. ~ Hal Erickson, Rovi