After a suspense-filled episode about a Khan Worm, the Winchester brothers are up for some more spooky supernatural forces in "Paint It Black".

Episode 16 will see Dean and Sam investigating a series of suicides committed by people going to the same church, according to the episode's synopsis by TVGuide. Before committing suicide, all of them confessed to the same priest, whose role is played by guest star, Stephen Daniel Curtis. Obviously, the hunters' first suspect is the priest, but it turns out he may be innocent.

In fact, International Business Times reports that it is the good-looking nun who may be at fault. While Dean confesses, the real person behind the killings is revealed. To add a shade of gruesomeness to the episode, victims of the perpetrator commit suicide by a slow, self-administered disembowelment. Gear up for a bone-chilling and spine-tingling episode.

While Sam and Dean tackle the supernatural power on Earth, in hell, Crowley captures Olivette, the leader of the Grand Coven. Fans may recall that Crowley is under a spell and completely enchanted by his mother, Rowena, who happens to be a naturally gifted witch. In a previous episode, the witch was banished from the Grand Coven because her magic was seen as too extreme. Capturing Olivette will give Rowena the chance to plead her case and get permission to practice her magic freely again.

Now, Rowena is dangerous even with the ban on practicing magic, if her ban is lifted, she will definitely become more dangerous. Moreover, this may spell trouble for the Winchester brothers since she is at odds with them. Will she convince the Grand Coven's leader?

Meanwhile, if she does get what she wants, will she leave Crowley? Fans know that her intentions are anything but noble. She may leave him when she acquires her powers. Watch the dramatic episode on Wednesday, March 25 at 9 p.m. ET on CW.