Diana Gabaldon Says ‘Outlander’ Season 3 Will Answer Book’s Mystery On Claire And Frank’s Relationship [SPOILERS]

"Outlander" Season 3 is still three weeks away from reaching the end of production, but it looks like fans have a lot to look forward to when the Starz time traveler series premieres in September. Author Diana Gabaldon shares her thoughts on the upcoming season, including details on the show's differences from that of her third book, "Voyager."

Spoilers ahead! Continue reading if you want to learn more about the details of this story.

"Outlander" Season 3 is going to solve one of the books' prevailing mysteries, says author Diana Gabaldon in an interview with Radio Times. This mystery revolves around Frank Randall (Tobias Menzies) and Claire Randall (Caitriona Balfe) and whether the former cheated on Claire while she was with her other husband, Jamie Fraser (Sam Heughan).

"I think the TV show treats him very fairly," she said of the writers' decision to answer this mystery on "Outlander" Season 3.

As most fans know, "Outlander" Season 3 will feature a 20-year time jump that will show aged versions of Claire. The Starz drama will also reveal what took place in between those 20 years they spent apart from each other.

While Gabaldon preferred to keep this a mystery in her books, the writers have decided to provide an answer to this question on "Outlander" Season 3. The author said that she, along with the fans, will have to wait till the show premieres in September to see whether they agree with the writers' decision.

Meanwhile, viewers were treated with their first look at older versions of Claire and Jamie on "Outlander" Season 3, according to HollywoodLife.com. Per their report, the show's official Twitter account showed Balfe and Heughan giving away hints on what to expect for the upcoming season, including three important clues: coconuts, soup, and the print shop.

Do you think Frank cheated on Claire on "Outlander" Season 3? Share your thoughts in the comments section below!