Exec producer Ronald D. Moore previewed the flashbacks abound on the upcoming episodes of Outlander in a report.
So much of the show is her drive to get back to that life and to get back to Frank and I didn't want to lose touch with that. I thought it was important that the audience keep understanding why she keeps trying to get back to those stones. What's waiting for her? What's that life she led? Otherwise, why wouldn't she just hang around here? You have to understand her relationship with Frank and understand that for her, that's home. You have to remind the audience each week and show them more, because they're going to get really invested in the show in the 18th century but she's trying to go to this other place. It's important to keep touching it every once in a while to remind everyone.