Dean may be the Winchester who’s become a demon on Supernatural, but Sam proves to be quite demonic and terrifying himself in TVLine’s exclusive video from the Season 10 premiere.

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“Whatever soul you had, whatever Boy Scout code you cuddled up to at night, it’s all gone,” a demon gal declares — but it’s not Dean she’s referencing!

Even as she begs for her life, Sam continues torturing her for answers about his brother and Crowley’s whereabouts. Just as executive producer Jeremy Carver previewed, you may be left wondering who the true monster is by the end of the sneak peek.

VIDEO Supernatural Season 10 Trailer Pits Winchester Vs. (Demon) Winchester

Supernatural returns Tuesday, Oct. 7, at 9/8c on The CW. A retrospective special, featuring fresh interviews with the executive producers and cast, airs Monday, Oct. 6, at 9 pm.

Press PLAY to watch the preview, then hit the comments with your thoughts on the darker side of Sam.