Constantine is long gone, but its protagonist is ready to make a comeback.

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All summer, the Internet has been rife with rumors of a crossover between NBC's canceled series and DC's CW enterprises. Now, the cat is officially out of the bag - John Constantine will indeed suit up once more to join Oliver Queen on Arrow.

"The Trench Coat is being dusted off. #Constantine #Arrow @CW_Arrow @amellywood looking forward to it. #thisfall," Ryan announced on Tuesday.

Amell previously hinted that Constantine's knowledge of the Lazarus Pits could come in handy, but Arrow's EP are keeping mum on what exactly the master of the dark arts is doing in Starling City.

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"The introduction of magic and mysticism on the show this season has provided a truly organic opportunity for us to bring John Constantine to Arrow and the CW's DC universe," executive producer Marc Guggenheim told The Hollywood Reporter. "It will be a well-deserved tip of the hat to all the Constantine fans who were so incredibly supportive of that series."

Constantine will pop up in episode 4, which is titled "Haunted." Arrow will return to The CW on Oct. 7 at 8 p.m. ET.

Tags: Constantine Arrow nbc the cw