Jeffrey played in the first two seasons of the series the father of main characters Dean and Sam Winchester, played by Jensen Ackles and Jared Padalecki. His last episode was broadcast in 2007.
In a statement hint the showrunner of the series, more old friends in the jubileumaflevering. “We are very happy that we have Jeffrey back for this milestone,” said this Andrew Dabb. “We think the fans are going to enjoy our plans with his character. And a number of other verrassingsgaststerren.”