Unexplained mysteries continue for Constantine, even after its cancellation. According to Deadline, the upcoming crossover episode of Arrow, which features Matt Ryan’s John Constantine character, was leaked online last night.

The episode, “Haunted,” airs this Wednesday, November 4th, and has been highly anticipated by fans of Constantine, who have been trying to get the show back on the air since it was cancelled by NBC. Recently, Constantine executive producer Daniel Cerone released an original new episode of the series. Additionally, he also urged fans to watch the upcoming Arrow episode, hoping The CW would take notice of Constantine‘s large fan base and possibly pick up the series.

The source of the leak is still unknown, but it has been downloaded by several thousand as of this morning.

In “Haunted,” Matt Ryan returns as the sly magician John Constantine to help Arrow with Sara Lance (Black Canary).

Here’s a trailer for the episode:

What do you think? Are you a Constantine and/or Arrow fan? Will you be watching the crossover episode?