just fucking click
Official synopsis for 6.18 under the cut. If you need to remind yourself how SPECTACULAR this episode will be here's the clip shown at Paley a couple of week's ago. Seriously if you are going to spoil yourself for one episode this is the one ;D
All spoilers for upcoming episodes can be found linked here on the Super Wiki
FRONTIERLAND
SAM AND DEAN RETURN TO THE WILD, WILD WEST - While searching for a way to defeat Eve, Dean stumbles upon Samuel Colt’s (guest star Sam Hennings) journal in the Campbell library. Realizing Samuel might have the answer to their problems, Sam and Dean ask Castiel (Misha Collins) to send them back in time so they can meet the man himself. While Sam is a bit reluctant to time travel, Dean is beside himself with excitement to return to the Wild, Wild West. Guy Bee directed the episode written by Andrew Dabb & Daniel Loflin with story by Andrew Dabb, Daniel Loflin & Jackson Stewart.
Source
All spoilers for upcoming episodes can be found linked here on the Super Wiki
FRONTIERLAND
SAM AND DEAN RETURN TO THE WILD, WILD WEST - While searching for a way to defeat Eve, Dean stumbles upon Samuel Colt’s (guest star Sam Hennings) journal in the Campbell library. Realizing Samuel might have the answer to their problems, Sam and Dean ask Castiel (Misha Collins) to send them back in time so they can meet the man himself. While Sam is a bit reluctant to time travel, Dean is beside himself with excitement to return to the Wild, Wild West. Guy Bee directed the episode written by Andrew Dabb & Daniel Loflin with story by Andrew Dabb, Daniel Loflin & Jackson Stewart.
Source