Episode 3x16 "No Rest for the Wicked"
DEAN'S TIME IS UP
It's 30 hours before Dean's (Jensen Ackles) deal with the crossroads demon is up and Dean, Sam (Jared Padalecki) and Bobby (Jim Beaver) are searching for Lilith, who holds the contract. They discover her location and Sam summons Ruby (Katie Cassidy) for help despite Dean's protests. Ruby warns them they aren't 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.Kim Manners directed the episode written by Eric Kripke (#316).
Source: GatetheWay @ GW
Promo pic's for 3x15 here:http://super.repro-network.net/eps315.html