S03E16: 'No Rest For The Wicked'

It's 30 hours before Dean's deal with the Crossroads Demon is up and Dean, Sam and Bobby are searching for Lilith, who holds the contract.

They discover her location and Sam summons Ruby for help, despite Dean's protests. Ruby warns them they are not ready to fight Lilith yet but they steal her knife and depart for New Harmony, Indiana.

In a battle to the death, Sam, Dean and Bobby take on Lilith and all her demons in a last-ditch effort to save Dean's life.