The name of the demon that killed Mary Winchester and Jessica Moore.
Who is Azazel?
The gun that Dean uses to kill the Yellow-Eyed Demon.
What is the Colt?
The prophet in Advanced Placement.
Who is Kevin Tran?
Sam and Dean's pseudo-father.
Who is Bobby?
Sam and Dean's first case hunting a shapeshifter.
What is 'Skin'?
The demon who tricked Sam into freeing Lucifer.
Who is Ruby?
Each angel has their own one of these.
What is an Angel Blade?
Who is Andy?
The mother/daughter duo that owned The Roadhouse.
Who are Ellen and Jo Harvelle?
The episode where Sam and Dean have to pretend to be the actors Jared and Jensen.
What is 'The French Mistake'?
Monsters from Purgatory that bleed black goo.
What are Leviathans?
The knife with special engravings that can kill demons.
What is Ruby's knife/the Kurdish knife?
The Queen of Moondor.
Who is Charlie Bradbury?
Who is Samuel Campbell?
Castiel's debut episode.
What is 'Lazarus Rising'?
The original Knight of Hell.
Who is Cain?
The only weapon that can kill a Knight of Hell.
What is the First Blade?
The angel that cut out her grace and was reborn as a human.
Who is Anna?
Their home base after Bobby's house was burnt down.
What is the Men of Letters Bunker?
The episode where Adam as Michael and Sam as Lucifer get sent back to The Cage.
What is 'Swan Song'?
The mother of all monsters.
Who is Eve?
The gun that can kill God, but will also kill whoever pulls the trigger.
The second-choice vessel of Michael.
The Winchester who kept the key to the Men of Letters Bunker.
Who is Henry Winchester?
The episode where Sam and Dean are transported into the TV.
What is 'Changing Channels'?