deanswingsbothways-deactivated2:
This is the point in the season where all the plotlines start coming together and making sense as a whole. Usually one is more time-sensitive and gets dealt with at the season finale, while one or two others provide the Big Twist Ending to set up conflict for the next season.
So we’ve got the Mark of Cain, Rowena’s seduction of Sam (regardless of whether it’s sexual, it IS a seduction… to the dark side, if you will) and her desire to have Crowley dead, and Metatron getting the demon tablet.