The angels in Supernatural speak Enochian. But to (most) humans it just sounds like a very high-pitched shriek!

Crowley often calls Sam "Moose" and Dean "Squirrel."

In "Mamma Mia" (Season 12, episode 2), Lucifer takes over the body of washed-up rock star Vince Vincente (Rick Springfield).

Sam and Dean's parents are John and Mary Winchester. After Mary was killed by the demon Azazel, John Winchester became a hunter and raised his two sons to fight the supernatural.

Originally, the show was going to be called Unnatural and it was about a reporter going around researching urban legends and writing about them in his column. It had absolutely nothing to do with the Winchester brothers.

Metatron wrote the Word of God tablets. According to the demon tablet, he is an Archangel, but Metatron himself claims to be an angel from the secretarial division.

After being turned into a werewolf, Garth Fitzgerald IV joins a pack of werewolves that peacefully coexist with humans (mostly) and married one named Bess.

Dean spends the whole episode chasing after Daphne, but it is Sam who finally locks lips with Velma.

Dean often calls his car, Baby!

Kevin Tran was an advanced placement high school student whose life was turned upside down when he became a Prophet. Kevin translated the Leviathan tablet which led to the downfall of the leviathans, and then uncovered the secrets of closing Hell.