The episode of "Arrow" season 4 where Matt Ryan's character Constantine appears has been leaked online.

Several reports say that a copy of the DVD screener that The CW sent out to members of the press for review purposes has been uploaded on several piracy streaming sites.

According to Variety, the episode where John Constantine will join Green Arrow/Oliver Queen (Stephen Amell) and the rest of Team Arrow hit the peer-to-peer download sites on Sunday, three days before its original airing schedule on The CW, Nov. 4.

The synopsis for the episode reads: "When things take a turn for the worse with Sara (guest star Caity Lotz), Oliver calls in a favor from an old friend who deals in the mystical, John Constantine."

According to iDIgital Times, the episode was made to bring Sara Lance back to Star City. "We needed someone to come in and help bring her back. He felt like the most exciting possibility and we're just thrilled to get him. He brings such a different element to the show," Wendy Mericle told IGN during the TCA press tour.

Can John Constantine restore Sara Lance back to her former self in the coming episode?

"Constantine" aired 13 episodes on NBC during the 2014-2015 season, but the network chose to cancel the show after its final episode.

As of 11:15 a.m ET on Nov. 2, the rough copy of the episode had been downloaded 11,677 times and the number is still growing. However, the download count is relatively low as compared to other popular TV series like "Game of Thrones" and "Supergirl," which have much higher piracy numbers.

The "Arrow" season 4  episode will air on Wednesday, Nov. 4.