Ultimately, Mary was sacrificed in order to set up Supernatural's ending. Killing the Winchesters' mother creates tension between Jack and the brothers, and this in turn helps reveal the true villain of the entire series to be God.
It is revealed that she was killed because she interrupted the demon as he fed his blood to baby Sam. Sam learns for the first time that he was fed demon blood, and that Mary knew the demon that killed her.
Unfortunately, though Mary did her hunters' blood proud, she fell foul of a temper tantrum from Jack Kline -- the Winchesters' Nephilim ward -- in Season 14. Jack accidentally banished Mary after losing control of his considerable powers, and her sons were unable to properly retrieve her intact.
Mary Winchester was the first death in the Supernatural TV series; however, in season eleven of the show, she was brought back to life by Amara, The Darkness. She was reconnected with her sons, Sam and Dean, and began aiding them in the family business, saving people and hunting things.
After a soulless Jack kills Nick for trying to resurrect Lucifer, he accidentally kills Mary in a brief fit of rage. Mary is reunited with her husband in Heaven and is now at peace in a shared Heaven with John.
Jack says he snapped and it was over quickly. He wishes it didn't happen. Dean is barely holding it together. He doesn't like that Jack is calling Mary's death, “the accident.” But he plays along and says they understand and they forgive Jack.
She contemplates with neither concern nor regret, only resignation, that she may be executed for what she has done. It occurs to her to wonder what may happen to the unborn child of a pregnant murderer, and she immediately resolves to be proactive about her situation.
Lydia is an Amazon who hooked up with Dean Winchester at a bar and the two made love in bed. She was impregnated by the older Winchester and in just a few hours, she was pregnant with her unborn child.
Sam is Mary's second-born son. Mary was murdered in his nursery by Azazel on the night of his 6-month birthday.
Mary asks Dean to tell her the truth. Dean tries to avoid it but Mary insists. Dean tells her that he is her son, and Mary is shocked by this. She is more horrified that she raised her children in this lifestyle.
Kripke cited budgetary reasons for Cassidy's departure after the third season. According to Cassidy, however, Warner Bros.'s uncertainty about what direction to take Ruby in prompted her to leave when the opportunity to star in the series Harper's Island arose.
Azazel eventually comes across Mary Campbell, the future mother of series protagonists Sam and Dean Winchester. After taking possession of her father (Mitch Pileggi), he kills her mother and stabs himself to kill his host. Mary's fiance, John Winchester, is the demon's next victim.
Supernatural sneak peek: John and Mary reunite in 300th episode | EW.com.
Related Story. This change also makes viewers think differently about everything we know of John, as it is said in Supernatural that John didn't learn about demons and monsters and begin his life as a hunter until after Mary is killed by Azazel.
Preseries. 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. He is named after his maternal grandmother, Deanna Campbell.
Emma finds Dean, telling him she is running away from the Amazons, but actually intending to kill him. When Dean hesitates, suggesting she could actually leave them, Sam arrives and shoots her.
Michael is the first and oldest of the four Archangels created by God, making him the very first angel ever created, as well as one of the oldest and most powerful beings in the universe.
Character Information
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.
Emma Winchester is the daughter of Dean Winchester and Lydia.
The show teases “new beginnings” for the fan-favourite couple, and gives viewers a look at how Ziggy handles going into labour. “Hello! Pregnant woman, in labour!” Ziggy yells at Dean, before the new parents are shown in the hospital looking at their newborn with love.
Within hours, Lydia becomes pregnant and gets a surprise call from Dean asking about a flask. Lydia tells Dean she's busy and hangs up on him. Several hours later, she gives birth to her and Dean's daughter Emma.
Nick was married to a woman named Sarah, and together they had a son named Teddy. One night, the demon Abraxas crept into their house and murdered Sarah and the baby in their beds.
In Lamb to the Slaughter, Patrick tells Mary that he is leaving her, most likely because he has met another woman.
Mary Maloney
After Patrick callously reveals that he intends to leave her, Mary snaps and kills him with a blow to the head using a frozen leg of lamb. Mary is able to cover up the murder with cunning intuition as she roasts the murder weapon, feigns innocence, and feeds the leg of lamb to the unsuspecting detectives.
In the story Lamb to the Slaughter, Mary's pregnancy influences the story because it increases her rage at Patrick for leaving and provides her an incentive not to get caught. Further, her pregnancy most likely makes the police more sympathetic to her when they arrive to investigate Patrick's death.