The greatest mystery the fans are dying to know will finally be solved in the Author's Book 10 for "Outlander" Season 3. That mystery is a bit terrifying as Frank and Jamie would now be seen in the same timeline.
While Frank will be on Jamie's timeline, it would lead to Jamie and Claire's reunion with hard scenes as well. According to reports, the mystery that will finally get an answer the moment wherein Frank observed Jamie as he watched Claire outside the window while standing on the darkened street. Moreover, Gabaldon promises that more mysteries will be solved in "Outlander" Season 3.
In an extended preview of the Book that will be released together with the "Outlander" Season 2 in Nov. 1, it summarized about Jamie and Claire's discussion while their daughter was still conceived. It relayed the happiest moment in their lives, and Claire realized it was wrong, but it was also the first night they were together in bed at the abbey.
Meanwhile Sports Rageous mentioned that Jamie described the feeling of being apart from Claire for 20 years. He described it like death since he was not used to be far away from her. He also added that the feeling was very different and he felt like they were filming different show. Though she was there, but they were on different timeline.
Gabaldon also confirmed that those mysteries of the upcoming scenes of "Outlander" Season 3 would finally be unveiled.