Henry Winchester

Henry Winchester is a man-of-letter and the grandfather of Sam and Dean Winchester through the paternal line.

History
Henry mysteriously appears in Sam and Dean's motel room while searching for his son John, and while hunting for a demon named Abaddon.

He was about to be receive his final initiation when Abaddon infiltrated and murdered the elders of the men-of-letters. He was given the key to all known spells to be kept safe from Abaddon, which he took with him into the future in an attempt to avoid the Knight-of-Hell.

Henry tries to put right the estrangement from his son John by attempting to use the blood sigil ritual to return to 1958, but is stopped by Dean as this would change the past. Henry is a traveler out of time and although Henry is aware going back to put things right might alter the present, believes this is a necessary act. Dean disagrees.

Later Henry and Dean plan to save Sam from  Abaddon. However a dreadful price is paid.

Powers and Abilities
As a man-of-letter, Henry had a number of abilities that allowed him to work with and against the supernatural. He was also well-versed with weaponry and was dextrous and intelligent enough to outwit his own grandsons and even a Knight-of-Hell. His notable skills include, but are not limited to
 * Soul-Tapping - Henry could tap his own soul to provide him with power. This enabled him to use a blood sigil that sent him to the future to his grandsons
 * Enochian Spells - Henry knew a number of enochian spells that aided him in his tasks