The production companies were PMP Legacy Productions, Showtime Network Inc. and Trilogy Entertainment Group. Special effects were creatd by Canadian companies C.O.R.E. Digital Pictures, Gajdecki Visual Effects, Lindala Make-Up Effects Inc., Rainmaker Digital Pictures and American Pixel Envy and Velocity Visuals. The series was a spinoff from the Poltergeist movies. The series was filmed in Vancouver and Victoria, British Columbia and lasted 88 episodes through 1999.
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