As far as we know, season four will follow Diana Gabaldon's Drums of Autumn. With Claire and Jamie making a new life in North Carolina (because Jamie's aunt lives there), their story will take a number of exciting new twists and turns. First and foremost is the introduction of a wily new villain, Stephen Bonnet, who will terrorize most of the major characters and give Black Jack Randall a run for his money. When they're not dealing with Bonnet, we'll get to see our favorite couple relishing in their domesticity, as well as taking on Native American ghosts and bear fights. Pretty standard problems for them.
What might be most exciting is the big meeting between Jamie and his daughter, Bree. That's right — she'll travel from Boston to the stones so she can go back in time and reunite with her parents. Expect plenty of emotion with her arrival, especially because she's not traveling to the past alone. Roger accompanies her, and their relationship has to overcome some pretty traumatic obstacles. Fortunately, the appearance of Lord John Grey should make up for it!