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The latest episode of "Supernatural" Season 10 titled "Girls, Girls, Girls" finally revealed who Rowena is, the mysterious red-haired woman in the ending scene of episode 3 titled "Soul Survivor." The Winchester brothers' hunt-of-the-week involves prostitutes, witchcraft and demons.

Spoiler Alert: This feature contains major spoilers on "Supernatural" Season 10, episode 7 titled "Girls, Girls, Girls."

A demon named Raul uses hookers to lure men in giving up their soul. Dean Winchester (Jensen Ackles) stumbles upon one named Shaylene, who was his hot date from a dating app.

Dean finds out that Shaylene does not really like her job as a demon's prostitute so he and his brother trapped Shaylene's boss for information. However, a disagreement between the demon and Shaylene resulted to the demon's death after the hooker grabbed the weapon from Dean and stabbed her boss with it.

The Winchesters thought they no longer had a lead in finding out who runs the operation but Shaylene showed them the Raul's card being handed out at bars. Sam (Jared Padalecki) and Dean arrives at Raul's place but they are already too late.

Rowena (Ruth Connell) showed up at Raul's place to save two girls from the demons controlling them. The new red-haired character showed her witch powers when she threw a hex bag at Raul that made the demon cough out black goo while the other demon working for Raul left his vessel behind.

Rowena takes the two girls to an expensive restaurant to recruit and train them with witchcraft. The witch once again showed her powers through the restaurant's head waiter when he asked the ladies to leave because of their dress code.

While dining at the fine restaurant, Rowena explained to the girls that she was once a part of a grand powerful coven but she was kicked out because of her extreme powers. Rowena's curse on the head waiter made the man's face turn red before he dropped on the floor and died.

Crowley (Mark Sheppard) finds out from the demon working for Raul that they opened a whore house under his name. Meanwhile, Sam and Dean discover that witches can kill demons when they found a hex bag next to Raul's dead body.

Sam's research revealed that a 300-year-old Latin spell that can kill demon exists. The research further revealed that the powerful spell was created by a witch named Rowena.

As for Castiel (Misha Collins) and Hannah's (Erica Carroll) angelic mission, someone from Hannah's vessel's life appeared and started to complicate things between the angels. The husband of Caroline, Hannah's vessel, kept a track on her credit cards so he was able to find her.

Caroline's husband could not accept that his wife left him behind because he does not know that Caroline became an angel's vessel. To make Caroline's husband stop, Hannah had to lie about having relationship with Castiel and even kissed him in front of Caroline's husband to make him see that everything is over between them.

Castiel talked to Hannah about what happened because she was feeling bad for hurting the feelings of her vessel's husband. Castiel shared that he had to take his vessel away from his family twice because the angel mission comes first and Hannah did the right thing.

However, Hannah decided that it is time for her to leave because of the human feelings and experiences she had while she was with Castiel. Hannah also revealed to Castiel that her decision comes from feeling Caroline's desire to have her life back with her husband.

Hannah said goodbye to Castiel and left her vessel. Afterwards, Castiel brings Caroline back to her husband, sits in the car and then searches for his vessel Jimmy Novak on the Internet where he is listed as a missing person.

Dean talks to one of the waiters at the restaurant to recount what happened to the victim. The waiter shared that the only unusual scene at the restaurant was the presence of the two hookers with a red-haired lady with them.

Sam finds out from another hunter about his unusual case of high class hotel staff members being nailed to a ceiling after dying from their brains being boiled. The Winchester brothers decide to conduct their investigation on the expensive hotels in the area.

Rowena trains her new girls with witchcraft but Crowley's demons arrive to capture the witch and her trainees. Sam and Dean, who killed the demons, was about to take on the red-haired witch but she cast a spell on one of the girls.

Sam tells the blonde girl to fight off the spell that Rowena cast on her so she could survive but she was not able to. Dean went after Rowena and the other girl, who no longer wanted to learn witchcraft. She tried to escape Rowena by punching her on the face but the witch is ready to strike back with another wicked spell.

Dean stops Rowena's spell on the other girl with a gun placed on the witch's head. The older Winchester already has the witch but Cole (Travis Aaron Wade) suddenly showed up with a gun on Dean's head forcing the hunter to drop his gun and Rowena escapes the scene.

Cole, who has been torturing a demon with holy water for information on Dean, is finally facing again the man who killed his father. However, the newbie hunter is stunned because the holy water had no effect on Dean.

The two had another fight with Dean still having the upper hand. Instead of killing Cole, Dean wanted to fix his issue with the guy once and for all. If Cole does not like Dean's explanation, he can kill Dean.

Dean tells Cole that his father was a monster that is why he killed him. Dean further explained that he gets the anger that Cole feels because of the experiences he had with losing someone he loves.

Sam, who was also there during the confrontation, told Cole that his family is waiting for him to return. However, Sam tells Cole that before he comes back home to his family, he must be whole again.

Cole drives off to go back to his family and the brothers have a talk on the speech that Dean gave where he said he is already past saving. "I was just telling the guy what he needed to hear," Dean tells his brother. However, the look on Sam's face suggests that he is not convinced with his brother's explanation.

Back in Hell, Crowley's followers succeeded in capturing and beating up the witch that killed one of his demons. Crowley heads to the cell where the red-haired witch Rowena is chained up but the King of Hell is shocked to find out that the person in front of him is his mother.

"Supernatural" Season 10 will return with episode 8 titled "Hibbing 911" which will air on Tuesday night, Dec. 2, at 9 p.m. ET on the CW Network.

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