Very few TV shows have made successful movies, I think, because it's hard to write for the masses who don't know the characters back-stories. Take "X-Files" for example or "Serenity" <Firefly>, while both good movies (IMO) I think watching them without knowing the backstory would have been clap Bring back Dean and Teri in their original roles and work in their semi-adult children. (Or set it as the children just start to get their powers).

EDIT: Mouse, you might think about changing the topic title, as when I first saw it I thought it might be about the TV show "The Medium".

VirginiaR.
"On the long road, take small steps." -- Jor-el, "The Foundling"
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"clearly there is a lack of understanding between those two... he speaks Lunkheadanian and she Stubbornanian" -- chelo.