The time has come to choose between #TeamKaren and #TeamPrednisone. With Rebecca out of the picture, it's time for one of our heroines to step into Marilyn's shoes, and if this show wasn't already six years old we might have a problem telling you that heroine is Karen Cartwright. History is made in Boston as Tom and Julia fight against the clock to pen the new finale, and Dev's secrets spill out like pills from a bottle. And back in this universe, Ali and Olly reflect on a treacherous season one as the champagne cork pops for the last time this year.