Supernatural's season 10 finale will leave viewers with "emotional whiplash."

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The CW drama is known for making fans dissolve into a puddle of tears and angst, and it appears "My Brother's Keeper" will cater to the series' tried and true tradition of devastation.

This year, however, Supernatural will lift your spirits with a hopeful revelation just before throwing a curveball to make you white-knuckle your way through the summer hell-atus.

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"Well we're inching up on the finale here and this is, in typical Supernatural fashion, fans are going to experience emotional whiplash of 'Oh thank God' to "Oh sh-t!' in the last two beats of the season," Misha Collins (Castiel) teased, according to Entertainment Tonight. "So there's some good and there's some terrible coming down the pipe."

Dean's (Jensen Ackles) Mark of Cain will undoubtedly take center stage as the season winds down, but the Winchester brothers and their wing man will have a multitude of threats to silence before the credits roll on May 20.

"The end of this season is definitely not heavy on the romance, it's more like we're trying to save our friend and possibly head off some really horrible things that are going to ruin the world," Collins said of Team Free Will's love life.

Find out more when Supernatural airs Wednesdays at 9 p.m. ET on The CW. Click the video below to see a preview for the series' next episode, "The Werther Project."