Sam, Dean, and Cas have the evening off, and Sam finds some pictures of outer space online. Cas is fascinated...

Dean is a benediction, and Castiel is drowning in him.

Destiel, PWP, basically. A deleted scene for "Free To Be You and Me" where there is sex. "He stumbled out of the dive laughing, Cas following behind, disheveled, asking what was so funny."

Castiel finds himself in a Manhattan under alien attack.

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one state into another. And what is grace, if not energy?

This is the way hunters approach things.

Anya, Illyria and Castiel have died, and have to answer to The Powers That Be - Chuck, Eve and Crowley - for both the good and evil they've done. They also hang out and get to know each other.

... and one time that he did. A series of short one-offs exploring Dean and Cas' relationship.

Humorous Cas/Dean, with multiple POVs. Slight AU. Fluffy. Ch. 5: Sam sat in the Impala in the motel parking lot, praying that three and a half hours at the library had been long enough. Now Complete, continued in the sequel "Wait Wait Wait."

...as decreed by Dean Winchester. Implied one-sided Dean/Cas.

...and one time Dean totally knew. Dean/Castiel. Crackish.