Over the years, "Supernatural" had introduced so many bad ass females and similarly, many of them also got killed off. In the most recent season 12, episode 10, "Lily Sunder has Some Regrets", a new killer who is also a lady made its debut and many were shocked when she came out of the episode alive.

Lily Sunder will live on to fight and or maybe be killed by another angel someday. "Supernatural" somehow has left the door open for Lily to come back with an implication that one day she may execute Castiel. Meanwhile, there are also plenty of ways wherein Lily can come back and none of which will involve those favorite angels from dying, Buddy TV reported.

In the case of Lily's return, her introduction was heavily tied to the idea of Nephilim and their dangers but she was also on the other hand, an angel expert. Further, her return will be of great involvement in hunting for Lucifer's love child. It will also be interesting not only to see her reaction to the mission, but on how she will handle it given that it is connected to her past.

Lily Sunder somehow could be the way for "Supernatural" to answer questions about morality. Meanwhile, it was also during the last week's episode when angel Castiel deals with the consequences of his past on earth. But this time, Sam and Dean will be facing a new villain with regards to Dean's loss of memory, Fan Sided reported.

It was in the recent trailers which laid out all the details for the upcoming scenes. Dean will disappear for a night into a certain town which is very unusual of his character. However, when he's going to come back the next morning, he will be completely losing his memory. It was not just because of the whiskey he has taken but someone has really put into a memory loss on him, and viewers should find out who the witch is, this week.