Supernatural, Season 9

Gadreel:
I sat in this hole for thousands of years, thinking of nothing but redemption, of reclaiming my good name. I thought of nobody, no cause, other than my own.

Castiel:
You've been redeemed, my friend.

Gadreel:
The only thing that matters in the end is the mission... protecting those who would not and cannot protect themselves... the humans. None of us is bigger than that. And we will not let our fears, our self-absorption prevent us from seeing it through. Not anymore.

Castiel:
No. Of course not.

Gadreel:
Move to the other side of your cell, Castiel, and keep your head down.

Castiel:
What are you doing?

[Hannah see that Gadreel has carved a suicide sigil on his chest and fumbles to unlock the door]

Gadreel:
When they say my name, perhaps I won't just be the one who let the serpent in. Perhaps I will be known as one of the many...

Castiel:
Gadreel.

Gadreel:
...who gave heaven a second chance. Run, sister.