Samuel Campbell

Samuel Campbell is the father of Mary Winchester (née Campbell) and the grandfather of Sam Winchester and Dean Winchester. He was married to Deanna Campbell. Both he and his wife were killed by the Yellow-Eyed Demon before Sam and Dean were born. John and Mary's son Sam is his namesake. He has recently been ressurected by Crowley. Ever since then he is united with the Campbell family (Christian, Gwen and Mark) who were unaware of the existence of the Winchesters. Sam kills him when he is possessed by Mother's monster.

Appearances
Season 4 Season 6
 * "In The Beginning"
 * "Exile on Main Street"
 * "Two And A Half Men"
 * "Family Matters"
 * "Caged Heat"
 * "Unforgiven" (flashback)
 * "And Then There Were None"