When Gordon Walker was 18 years old, a vampire broke into his house and abducted his sister. Gordon ran away from home, learned how to fight, hunt, and kill vampires, and tracked down the vampire who had taken his sister. He killed the vampire, as well as his sister, who had been turned, marking the beginning of his hatred for the undead.

Dean lived with Lisa Braeden and her son for a full year, but their relationship came to a tragic end when Dean asked Castiel to erase her memories of him.

Dean was four when his mother died and Sam was six months old.

In "Tall Tales" (Season 2, Episode 15), Dean enjoys a purple nurple.

In "The Benders", a backwoods family of hunters likes to stuff and mount their kill as trophies. Only they hunt other people.

When Dean learns that Lisa Braeden has a son who bears a striking resemblance to him, he suspects that he may be a father. But she insists that Ben is not his son.

Since Dean discovered these creatures, Bobby told him he should get to name them. He named them Jefferson Starships after the 1970s band "because they're horrible and hard to kill."

The Leviathans are ancient, primordial monsters, predating angels, humans, and even the soul itself. They are also known as The Old Ones, Chompers, or Levis -- but NOT as tar babies.

Samuel Colt is a hunter who lived in the 19th century and the creator of the Colt--a gun that can kill almost any supernatural being. Colt also designed the locked door that keeps the portal to Hell known as the Devil's Gate from opening. The Devil's Gate and the Colt gun are linked together--the gun serves as the key to the gate, allowing it to be opened by inserting the Colt's muzzle into the key hole.

Jensen Ackles is a fan of the Dallas Cowboys