Fic: The Lessons of (Alternate) History

[i_speak_tongue]

TITLE: The Lessons of (Alternate) History
AUTHOR: i_speak_tongue
CHAR: Dean, alternate-future!Cas, and a tiny bit of Sam
GENRE: Gen, h/c
SPOILERS: Nothing specific past 7.01, but takes place mid-season 7
WORDS: 1733
A/N: This was written for mad_server, and the hoodie_time h/c challenge, for  this prompt. 
SUMMARY: The boys pick up a hitchhiker... from another universe. Also, Dean is sick.

( There’s blood on the walls, the old sanatorium gutted, now in more ways than one. )