This Friday, "Constantine" concludes with "Waiting for the Man," which pits Constantine against Papa Midnite in a desperate struggle for Constantine's life.

After dark forces put a bounty on Constantine's head, Papa Midnite will stop at nothing to collect it. This trailer shows many of those dark forces in action as Constantine holds on by his wit and sheer force of will. Check out the trailer below for a sneak peak of the season finale.

"Constantine" airs this Friday at 8 p.m. EST on NBC.