When we last saw the SUPERNATURAL gang during their midseason finale, the Winchester brothers had decided their big plan to finally defeat Chuck/God was to lock him away, must as he himself had done to his sister, Amara. To accomplish that, they reunited with the archangel Michael and their half-brother Adam (who was essentially sharing his body with Michael after they had both been released from the cage) and reunited with Rowena (now the Queen of Hell). We ended the episode with Sam and Eileen having been lured to Chuck, who was clearly not happy about their plan to shut him away, and Dean and Castiel in front of a portal to Purgatory, which they needed to return to in order to find an ingredient crucial to the spell to lock Chuck away.
When the show returns for its final midseason premiere, Sam is going to get a tour of other alternate universes courtesy of Chuck. Meanwhile, Dean and Castiel will have to work together in Purgatory to try and stay a step ahead of Chuck.
Browse through photos above from the January 16 episode of SUPERNATURAL airing on The CW.