Here's the trailer for episode 20

Amara returns! Metatron returns as well. We have the return of the fog that turned people into the rabids and is infecting people again. Amara is using an infected cop to get a message to Dean. This looks like a really exciting episode. What do you think? What part will Metatron play in the fight with Amara? Will Sam's former cure for the rabids work this time? What message does Amara want to deliver to Dean? Let us know in the comments or in the discussion thread for episode 20.