Cain and Abel (both deceased) - It was revealed by the Archangel Michael that through the Winchester bloodline, Dean, Sam, Adam, Henry, and John are descendants of Cain and Abel, making John a vessel and Dean his true vessel. In The Executioner's Song, the now-demonic Cain was killed by Dean.
Cain, also known as The Father of Murder, was the firstborn of Adam and Eve, the brother of Abel, founder, former leader, and trainer of the Knights of Hell and one of the most legendary, powerful and feared demons of all time. Cain and his brother are also the direct ancestors of Sam and Dean.
Precognition - Dean had a nightmare that showed him in a room having slaughtered a group of men. It later came true. Immortality - According to Death, the Mark makes the wielder virtually immortal as its power is such that even Death himself can't reap the person with the Mark.
Dean Winchester was born on January 24, 1979 to John and Mary Winchester in Lawrence, Kansas. He is the couple's first child, four years older than his younger brother, Sam.
Emma Winchester is the daughter of Dean Winchester and Lydia. She is an Amazon warrior, trained to kill her father, but she refuse to go through it and was accepted by her family. She is very close to Cassandra.
Cassandra Masters is the daughter of Castiel and Meg Masters and the only known Nephalem to exist, which is a hybrid between a union of an angel and demon, even being part human due of Castiel and Meg's human vessels. Cassandra acts as one of the leading main characters with Sam and Dean.
When Dean had first met Ben Dean considered the possibility that Ben might actually be his son. Lisa confirmed to Dean that Ben wasn't his son and his similarities to him was due to her 'type' that she hooked up with that Dean had fallen under.
Before dying, John tells Dean, if he can't save Sam, he'll have to kill him, should he become evil. The fourth season episode "On the Head of a Pin" reveals that the demon Alastair tortured John in Hell for over a century, with John refusing the demon's offer to stop if he himself would torture someone else.
Dean is four years older than Sam and was always told from a young age to "watch out for Sammy". When a demon killed their mother, it was Dean who carried baby Sam out of the house.
Character Information
Millicent "Millie" Winchester is the second child of John Winchester and Mary Campbell, the younger sister of Dean Winchester, and the older sister of Sam Winchester.
The finale took place five years after the penultimate episode, according to Jared Padalecki, placing the timeline in 2025. By this point, Dean would have to be 46-years-old, leaving that as his final age. In Heaven, he met Sam about 25 years after his death, meaning Dean would have been 71 had he lived until then.
Live Free or Twihard - Dean is bitten and turns into a vampire.
Finally apologizing, Sam tells his brother, “I should've looked for you when you were in purgatory.” Sam never forgave himself for that. But Dean's forgiven him.
At the last moment, Dean instead kills Death with the scythe, who crumbles into dust. Crowley brings Oskar with Castiel and Rowena, who sadly kills Oskar to complete the spell. The spell causes a lightning bolt to finally erase the Mark of Cain from Dean's arm.
Using the spell given to them by Michael, the Winchesters and Castiel were able to lock God away. Castiel chose to take on the Mark of Cain created by the spell and bore the burden of trapping God.
God is the oldest among them and always existed. Chaos came into existence with the absence of Light in an area which was caused when God decided to retreat Himself to a smaller form before beginning to craft Creation.
For the rest of his life (an epilogue in the series finale tells us Sam never gets home, but in our terms, it was for the next four years/five seasons, the duration of the show) that Sam would continue to travel back and forth through time, swapping identities with various people and as a tagline for the show ...
Sam and Dean are unable to form romantic attachments to others, and therefore their love is locked in an eternal feedback loop, referring back only to itself. They don't have anyone but each other (and their father) to love, and since their father's death, they love none but each other.
Like A Virgin is the 12th episode of Season 6.
Sam's supernatural abilities are the result of him being fed Azazel's demon blood while he was an infant. Sam exhibits signs of precognition throughout the first season, manifesting as dreams of others' deaths and later as visions.
Mary Winchester (Samantha Smith)
Targeted by Azazel, retired hunter Mary had the distinction of being the first character to meet her maker. The Yellow-Eyed Demon pinned Mary to the ceiling of baby Sam's room, slit her stomach, and eventually set her ablaze. Mary's gruesome demise forever scarred the Winchesters.
Lydia met Dean Winchester, along with Castiel at a bar. She shared a conversation with the Winchester and then went to her house where the two enjoyed a night together. Unknown to Dean, Lydia was impregnated with his child and in just a couple of hours, Lydia was already nine months pregnant.
Adam Millagan is a supporting character in Supernatural. He is the younger half-brother of Sam and Dean Winchester and the son of John Winchester. He appears as a minor character in season 4 and a supporting character in seasons 5 and 15. He also serves as the primary vessel for the Archangel Michael.
Due to Jack being the son of Lucifer, Dean originally viewed Jack as a threat that had to be stopped from being born. After Jack was born, with Sam unwilling to kill him, Dean would keep an eye on Jack, threatening to kill him if Jack ever turned evil. Jack in turn sought Dean's approval and affection.