Poltergeist: The Legacy - Season 1 - Eps 9: Doppelganger
The episode begins with Derek having a dream. He is in a coffin, at first dead, with all the Leagcy members standing over him. He wakes, but no one notices. He is then in an Egyptian tomb, lying on a stone table. A woman cuts open his chest, he wakes up. In his bedroom, he sees a young girl, Kali. She asks his, ""Are you the one"". She attacks him, and tells him to forget what he saw, that this is only a dream. Kali moves over to a picture on Dereks table, a picture of Rachel and Kat, Kali looks at Kat and smiles. (A sinister smile). The next morning at Clairemont School, Kat is beginning school. She gets teased by older girls and runs away. In the bushes, Kali appears and tells Kat that she is her new best friend. Kali attacks the other girls with an invisible force. Rachel is called to the school to collect Kat. She's been suspended because of what happened to the other girls. Kali appears in the school corridors, but Rachel can't see her, only Kat.
About Poltergeist: The Legacy

Title: Poltergeist: The Legacy
First Air Date: 1996-04-21
Last Air Date: 1999-11-12
Status: Ended
Rating: 6.1/10 (from 33 votes)
Language: EN
Seasons: 4
Total Episodes: 88
Network: Showtime
Genres: Sci-Fi & Fantasy
Production Companies: Trilogy Entertainment Group
Synopsis
The adventures of the members of a secret society known as the Legacy and their efforts to protect humankind from occult dangers.
Cast

Derek de Lint
Derek Rayne, Ph.D.

Martin Cummins
Nick Boyle

Helen Shaver
Rachel Corrigan, MD

Robbi Chong
Alexandra Moreau

Kristin Lehman