Supernatural- Season 12 Episode 12- Stuck in the Middle (With You)
Mary calls the boys and Castiel to help with a case she is working, but she neglects to mention she is working with the British Men of Letters. They sent her after something that a demon has.
The demon happens to be a prince of hell named Ramiel and has yellow eyes. There has not been a yellow eyed demon since season two when Azazel was killed. He gravely injured Castiel with the lance of Michael and almost killed all the Winchesters.
While fighting with him Sam was able to get the lance and used it on him. He turned to dust, and after he disappeared the Winchesters were trying to help Castiel. Crowley picked up the lance, all of sudden white light appeared, and Castiel was healed. Then the lance was broken into two pieces.
Then Mary meets with one of the British Men of Letters and promises to destroy them if they lie to her again, and she handed over the item to the British Men of Letters. It was the colt. Crowley knew the prince had it because he had given it to him as a gift. Now the British Men of Letters have it in their possession.
And then Lucifer (Mark Pellegrino) makes his return at the end of the episode. Crowley has him locked in a cell.
Next week’s episode Sam and Dean ask Rowena to find Crowley’s son Gavin.
Supernatural airs Thursday nights on The CW, and you can check out the latest episodes here: http://www.cwtv.com/shows/supernatural/