• Dean: You guys don't walk enough. You're gonna get flabby. You know, I'm starting to think Junkless has a better sense of humor than you do.
  
• Castiel: You need to be more careful.
  Dean: You need to learn how to manage a damn devil's trap

More On the Head of a Pin Quotes

• What will the angels' "assignment" do to Dean?
  

• Alastair reveals how Dean actually broke the first seal and started the journey toward the apocalypse!
  

• (no non-original music)

• As Dean is about to torture Alastair, the demon taunts him, "Grasshopper, you're going to have to get creative to impress me." This is a reference to the TV series Kung Fu (1972-1975), starring David Carradine as Kwai Chang Caine, a Shaolin priest who wanders America in the 19th century. "Grasshopper" was the nickname that his mentor, Master Po, gave him.
  

More On the Head of a Pin Allusions

In an alternate reality mysteriously created as if Sam and Dean where never brothers and have never met, Sam and Dean work at a marketing office where they are forced to team up with one another when a series of mysterious suicides point to a ghost haunting the premises.

It's a Terrible Life