The Grim Reaper is set to return.

In the first promo for Supernatural Season 9, we see Dean concerned over the state of his brother, expressing shock to a doctor who claims Sam's life is in "God's hands." We then see Death himself confronting the revived Winchester sibling with an eerie warning: I've been waiting for you.

Might this be the secret Supernatural spoilers have hinted Dean will be keeping from Sam? And what about all those angels who have fallen back to Earth? How will they come into play on the opener?

Prepare for the October 7 premiere now with a couple glimpses of Abaddon and Castiel as well. Watch, enjoy... and be afraid:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.