I'll try to post these every other week day (Mon-Wed-Fri), but I make no guarantees. Sometimes there will be more than one cap for a beginning or ending of an episode. I'm also using my capper's discretion - meaning I'm choosing the most aesthetically pleasing image that we see first or last not always literally the first or last things we see. I'll explain this as we go along.
:: Click on images for the HQ versions ::
6.21 Beginning: The episode begins with the author, H.P. Lovecraft, meeting a very bloody end in 1937.
Our first look at the boys is of Dean at Bobby's house, not doing research, but probably thinking about when Cas visited the night before and ignored Dean's warnings.
6.21 Ending: By episode's end, Lisa & Ben are alive and safe, but their memories are wiped clean of their time with Dean by Cas at Dean's request. In the final scene, Eleanor Visyak is kidnapped by Castiel.