|Dates||???? - 2006 (killed by Sam and Dean Winchester while possessed)|
|Location||Andover, Massachusetts (originally)|
|Episode(s)|| 1.22 Devil's Trap|
4.02 Are You There God? It's Me, Dean Winchester
Meg Masters. Nice to finally talk to you when I'm not... you know... choking on my own blood. It's okay. Seriously, I'm just a college girl... sorry, was. I was walking home one night when I got jumped by all this smoke. Next thing you know I was prisoner in here. Now, I was awake. I had to watch while she murdered people.
– Meg Masters, 4.02 Are You There God? It's Me, Dean Winchester
Meg Masters is a college student from Andover, Massachusetts. Her phone number is 312-555-0143 (312 is a central Chicago area code). She was possessed around October 2005, and is possessed for a year. She dies following the exorcism of the demon by Sam and Dean around November 2006.
- The demon who possessed Meg Masters in season one and Sam in 2.14 Born Under a Bad Sign is commonly referred to by fans as the "Meg!Demon" or simply "Meg."
- In 7.17 The Born-Again Identity, Meg the demon assumes a position as a nurse in a psychiatric ward. She uses her previous meatsuit's name, becoming Nurse Masters.
- Meg dies in 8.17 Goodbye Stranger while ironically buying Sam and Dean time to escape from Crowley.
Meg calls Dean to reveal that she has their father. Later she tracks them down at Bobby Singer's place, but is captured under the devil's trap. Sam starts to exorcise the demon, while Dean interrogates her as to their father's whereabouts. Bobby points out to them that she is actually a woman possessed by a demon, and that because of the injuries she sustained in Chicago, will die when the demon leaves her. The demon is eventually exorcised. With her dying breathe, she thanks Sam and Dean and tells them where John is being held before she dies.
Lilith cast a spell that broke the first seal that held Lucifer captive and released causing the Rise of the Witnesses -– ghosts of people who died of supernatural causes, now forced to return and kill those who let them die. The spirit of Meg Masters returned and confronted Dean. She told him how she was a college student when she was possessed, and that she was "awake" during her possession, and witnessed much horror. She also told him how her disappearance had a terrible effect on her younger sister, who killed herself after Meg was found dead. When Bobby Singer works on a spell to put the Witnesses back to rest, Meg attacks along with Victor Henriksen, Ronald Resnick and two little girls Bobby failed to save. Sam and Dean are mostly able to hold her off, but realizing what Bobby is doing, Meg tries to rip his heart out. However, the spell is nearly complete and Dean is able to finish it, putting the Witnesses, including Meg, back to rest and saving Bobby.