The first trailer for the fourth (and final) season of "Mr. Robot" makes it clear that happy endings are not likely for this dark drama.

Against a Christmas backdrop (and a brooding version of "Silent Night"), Elliot (Rami Malek) says, "We need to go back to work," even though he's warned, "You go down this path, it'll never end."

(We Shazamed the music from the trailer for you: It's "Silent Night, Dark Piano Version" by Myuu.)

There's drugs, a bloody smashed phone, at least one body bag and Mr. Robot (Christian Slater) and Elliot standing in front of might may very well be a funeral pyre.

Season 4 will premiere Sunday, October 6 on USA.

The "Mr. Robot" Twitter account shared this image earlier today with the phrase, "Keep your eyes open. Something is coming."