In the TV show, it's pretty clear that Fergus and Marsali don't know that Claire is a time traveler. At least, by Outlander Season 5, Marsali doesn't know.
Murtagh. In a departure from the books, Claire and Jamie told Murtagh that she was from the future to explain exactly why they were so consumed with thwarting Bonnie Prince Charlie's plans to take over the British throne.
Claire, Jamie and Young Ian return from America to visit, just in time to be with him as he dies, and Jenny whoops and sheds tears at seeing her son again after so long. Claire tells the entire family her true identity of being a time-traveller from the future, but Jenny still views her as a 'witch' or 'faery-woman'.
For now, though, it appears both Fergus and Marsali aren't time travellers with actors Lyle and Domboy addressing this in an Instagram live Q&A from earlier this year.
After he's interrogated, John asks Jamie to assure him that Claire will be safe, at which point Jamie reveals that Claire is his wife. Jamie ostensibly still plans to kill John, but an angry Claire argues that there's no evidence that John is a spy.
Some think Jamie's spirit (but not his body) traveled to through time to guide Claire to him; others suggest Jamie had a near-death experience after the Battle of Culloden, and that's why his ghost is 25 when he appears to Frank.
At the start of the eighth book, Jamie reveals that he is alive. He had been on another ship with Jenny. He does find out that Claire and John married, and it ends his friendship with John.
We learn that Fergus (Romann Berrux) is not getting drunk and beating Marsali.
Well, Fergus is believed to be the son of the comte and Amelie Beauchamp.
Fergus apparently knows Claire is a time traveler in Outlander. Diana Gabaldon mentions now and then on social media that Fergus knows Claire is a time traveler. This is something that happens off-book in the series. Fergus and Marsali have both learned the truth, which is important for later books.
Murtagh is often mistaken for Jamie's father, but he is actually his kindly godfather. He is not married and hasn't fathered any children.
Claire visits Faith's grave, where she leaves a single pink tulip from Jared's conservatory, and is surprised at how emotional she feels after all this time.
Since there is a price on Jamie's head, he, his sister Jenny, and his brother-in-law Ian concoct a scheme wherein she "turns him in" to the British, as he is wanted for the crime of treason for the part he had played in Bonnie Prince Charlie's attempted Scottish uprising.
To Fergus, Claire is the closest to a mother he's ever known. And for Claire, she loves and views Fergus as her child, whether she bore him or not.
"The ghost is Jamie–but as for how it fits into the story, All Will Be Explained—in the last book," Gabaldon writes in the FAQ section of her website. She's also revealed that the Outlander series will likely have ten books total, and the ninth, Go Tell the Bees That I Am Gone, debuted in 2021.
Diana Gabaldon has confirmed there is no possibility that Jamie Fraser will time-travel into the future and live out his life at Lallybroch.
Henri-Christian is born as the fourth child of Fergus and Marsali. He is a dwarf and some of the residents of Fraser's Ridge believe he is a punishment for his parents' sins.
In early 1779, pregnant Marsali, Fergus and their daughters Joan and Félicité settle in Wilmington. Their eldest son, Germain, returns to Fraser's Ridge with his grandparents, Jamie and Claire, as Fergus and Marsali think that it is dangerous for a boy Germain's age to live in a large city in time of war.
Fergus is 17 years older than Ian and 15 years older than Marsali.
Marsali however took to each trial courageously and saw a future away from Fraser's Ridge. In the fifth episode, she decided it was best to move her family to New Bern for a fresh start and to keep Fergus far from its negativity.
In the dramatic final episode, pregnant Marsali (Lauren Lyle) was beaten and Claire was kidnapped and raped by Lionel Brown (Ned Dennehy).
When Claire finds more bruises on Marsali's wrist, she asks her straight up if Fergus is doing this to her. Marsali explains she was so fed up with him being drunk that she lost her temper and attacked him — he grabbed her to defend himself.
Grey falls in love with Jamie, who rejects his advances. Still, Grey cannot dismiss his feelings.
When Jemmy holds the stone, it feels incredibly hot. It's so hot, it breaks in his hands. The stone is hot to the touch for Claire, Bree, and Roger, too.
Did you guess Lord John Grey? Because yes, Claire and Lord John end up married in book seven, and yes, they drunkenly (and full of grief for the loss of Jamie, whom they both love with all of their heart) consummate that marriage.