From a media release:
Astral Media’s The Movie Network (eastern Canada) and Corus Entertainment’s Movie Central (western Canada) have commissioned 13-episodes of one of the first television series ever to be conceived from an Internet-based concept. Initially developed as eight broadcast-quality webisodes from the creative talent behind Stargate: SG-1 and Stargate: Atlantis, Sanctuary is an original drama series that is also the first to be shot entirely on green screen.
Commissioned by and airing on The Movie Network and Movie Central, the series has also been green lit by the SCI FI Channel in the U.S. which will broadcast the series day and date with the Canadian broadcasters in fall 2008.