Supernatural's Cas and Dean are taking their worries out on one of Dean's favorite foods in "The Things We Left Behind"

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No, it's not pie. It's burgers. And it's good to see the former demon is eating as the Mark of Cain storyline begins to ramp up once more. Last time he turned down a heart attack on a bun, his demon nature was starting to take over. As the elder Winchester heads into his second burger, however, his normal appetite may ease some fears for fans as the series heads into the midseason finale.

Unfortunatly, the tension is quickly upped again as the friends turn their conversation to Cain's pesky brand. Dean (Jensen Ackles) appears to flashback to what one can only hope was a rather gruesome dream, and he attempts to allay his fears by asking his formerly winged friend to off him if the Mark starts to change him once more.

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The angel doesn't make any promises, however. Cas (Misha Collins) is going through a midlife crisis of his own at the moment. Worried about those he has hurt over the course of the series, Cas will attempt to reunite with his vessel's daughter before Supernatural breaks for the holidays.

Dean offers a helpful piece of advice, one that he would do well to listen to as well.

"Some stuff you just gotta let go, okay?" Dean explains. "The people you let down, the ones you can't save - you've gotta forget about them, for your own good."

Will Cas listen?

Find out more when Supernatural airs Tuesdays at 9 p.m. ET on The CW.

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Supernatural, Television, The cw