'It's a Bad, Bad, Bad, Bad World' (Story Code 4301133 & 4301134) by Jeannine Renshaw (Part 1) and Curtis Kheel (Part 2)

When sending Chris back to the future, Gideon creates a portal that puts Chris and Leo in a mirrored world where evil prevails…

Holly Marie Combs (Piper Halliwell), Alyssa Milano (Phoebe Halliwell), Rose McGowan (Paige Matthews), Dorian Gregory (Inspector Darryl Morris), Brian Krause (Leo Wyatt), Jason and Kristopher Simmons (Wyatt Halliwell), Drew Fuller (Chris Perry), Gildart Jackson (Gideon), Billy Drago (Barbas, Demon of Fear), Jenya Lano (Inspector Sheridan), Sandra Prosper (Sheila Morris), Betsy Randle (Mrs. Winterbourne), Lorna Scott (Mrs. Nobles), Blake Robbins (Patrol Officer), Wesley A. Ramsey (Adult Wyatt), John Todd (Elder), Jim Abele (Doctor Roberts), Dayna Devon (Female Vulture Demon), Kristopher Logan (Male Vulture Demon), Samantha Miller (Cindy), Kerry O’Malley (Nurse Ann), J. Lamont Pope (Mike)

Directed by Jon Pare (Part 1) and James L. Conway (Part 2)
Produced by Holly Marie Combs, Alyssa Milano and Jon Pare
Executive Producers Brad Kern, Aaron Spelling and E. Duke Vincent

TX (US): 16th May 2004

Notes:
*Featuring Piper Halliwell, Phoebe Halliwell, Paige Matthews and Leo Wyatt

*This is a double-length episode