Supernatural Season 9 Spoilers: Lindsey McKeon talks Tessa's death and Dean's Mark of Cain problems

The Mark of Cain and the First Blade have been a major focal point of the second half of Season 9 of Supernatural. The show has focused specifically on how the Mark and the weapon affect Dean, and the latest episode, "Stairway to Heaven" took him to an even darker place as he started to become much more aggressive and sliced a few people open.

One casualty was Tessa (Lindsey McKeon), though she took her own life with the Blade, which was in Dean's hands. McKeon talked about what this means for Dean in an interview with EW.com:

"What this Blade is doing to him is giving him this sort of infatuated sense of self, sense of power, sense of ego, and he's really become addicted to and enjoying the killing aspect. In a moment he's sad Tessa's gone and he feels for that, but in the next moment, there's some force that is beyond him that's overtaking him. And this is what Tessa realizes when she sees him with it which is why she basically [says] 'Dean this is trouble. How are you getting into this and why are you doing this?' So I'm sure you'll see more of that play out in the season finale, and obviously the other angels come in and don't believe necessarily that he didn't kill Tessa."

It's possible her character could return, and McKeon said she "would absolutely love it" because Tessa is one of her favorite characters to play.

What do you think, Supernatural fans? Is Dean too far gone to save? Will Tessa return? Let us know in the comments below.