Point of No Return

Summary
This episode is slated to be a defining moment for Dean Winchester. Executive Producer Sera Gamble reveals that this episode involves the Archangel Michael while also noting that crises will have come to a head for Dean and Castiel. This could be an allusion to the possibility that this may well be the episode where Dean finally agrees to serve as Michael's vessel to stop the Apocalypse once and for all. A very important character is also confirmed to sacrifice themselves on a suicide mission in this episode, leading to widespread theorizing on which character the series will be losing in this episode.

Major Characters

 * Dean Winchester
 * Sam Winchester
 * Castiel
 * Michael

Trivia

 * This episode has landmark significance as the 100th episode of the entire series.
 * Many shocking twists are confirmed to take effect in this episode.