Question: Who was the creator of the American fantasy horror television series starring the American actor who was a co-host of the television series "Ghost Stalkers"?
Sentence (from "Supernatural (U.S. TV series)"): Starring Jared Padalecki as Sam Winchester and Jensen Ackles as Dean Winchester, the series follows the two brothers as they hunt demons, ghosts, monsters, and other supernatural beings.
Relevant evidence: No