Apparently, the stones realized that Brianna and Roger weren't ready to leave the 18th century just yet. They both said they'd wished to go "home" as the stones whisked them away, and that's exactly where they went: the place they now consider to be home, back with Jamie and Claire.
At the same time, Young Ian Murray (John Bell) was taking Roger and Brianna back to a set of standing stones, so they could go back to the future where they would be safe. However, the couple ended up remaining in the past after they felt like Fraser's Ridge was their home rather than the 20th century.
Book spoilers ahead.
Bree and Roger do eventually go back to their own time in the Outlander novels after Brianna gives birth to their daughter Mandy.
In the book, Roger leaves alone. However, in the series, the writers have decided to keep Bree and Roger together. This is potentially to join together some other storylines as Roger's journey to becoming a minister happens much earlier in the books, timed with Flora MacDonald's barbecue.
By the end of book 6, Brianna and Roger, after the birth of their second child, decide to return to the future, taking Jemmy with them in order to escape the hardships of the 1770s; a storyline that would shake up Brianna and Roger's arc in the Outlander series for the first time since they came to the past in season 4 ...
"I think that Jamie found the respect for Roger. There was a lot of misunderstanding between the two of them from the off, but he's seen him in the light of what he is and has a respect and admiration for Roger, which will presumably continue from here on in."
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. It's cold when Ian or Jamie hold it.
A security guard finds Jemmy in a tunnel under Loch Errochty, but is shot by another man, presumably Cameron's accomplice.
We already know that Bree has forgiven Jamie. Skelton told Parade that forgiving Jamie was easy. For her, the hardest thing to forgive was that right to revenge. Brianna would have wanted to get her own back on Bonnet and Jamie, in a way, took some of that chance from her.
After finding out that Brianna was raped, Jamie beats up Roger, believing him to be the man who assaulted his daughter. Brianna slaps Jamie in the face, and they have yet to truly reconcile.
Following the Battle of Culloden, Fergus continues to live at Lallybroch, and Jenny Murray tutors him with the rest of her children. He sometimes brings food to Jamie, who lives in a cave near the estate.
She previously told one fan, who hoped for Jamie to time travel in the 10th and final novel: “Sorry, not happening.” Nonetheless, Jamie does have some powers after he was able to project himself into the future and appeared in Inverness with Frank Randall (Tobias Menzies) spotting him.
Roger was born sometime in 1941. Brianna was born in 1948. That's a seven-year age gap, which doesn't sound too big but it will affect some elements of their relationship.
Brianna and Roger grow their family in Go Tell the Bees That I Am Gone. It turns out that they do have another baby. It's some time while they're in the past, and they name their new son David William Ian Fraser MacKenzie. He's known as “Wee Davy” or “Davy” for short.
Roger is the father of Bree's baby in Outlander
After cutting Jemmy's hair to get rid of the lice, Bree saw a mole. She worried at first, but Roger was able to calm the fears.
But Outlander reversed course in the Season 5 finale, revealing that Brianna, Roger, and Jemmy hadn't actually traveled through time, as the previous episode had led us to believe. They actually stayed right where they were in 18th century Colonial America.
They fell in love with each other, although Brianna wouldn't admit that she was in love. Not really. She didn't know what love was. As happy as they were, they would be driven apart by their different wishes in their relationship and their life.
Father seems to formal, and she can't call him daddy, Frank was her daddy and to call him this would seem a betrayal, and she certainly couldn't call him Jamie! True to form, Jamie sees her discomfort and interprets it correctly, and tries to help alleviate her distress. “You can… call me Da, ” he said.
Gemma Fray took on the role of Brianna between the ages of eight and 10, before actress Sophie Skelton took over the part as a teenager and young adult. The reason Skelton took over the role in the first place is simply Brianna grows up over the course of Outlander and an adult actor was needed to play the part.
See, before her wedding, Jocasta signed over ownership of River Run to baby Jemmy so that Duncan Innes wouldn't have any claim to it; Jocasta was the estate's guardian until Jemmy came of age.
Rob Cameron, one of Brianna's coworkers, kidnaps Jem, and it appears that he has taken Jem into the past. Roger and William travel through time to find them, but Rob appears at Brianna's home and orders her to tell Jem to disclose the location of the gold.
In the book, Jemmy's head is shaved after he gets lice, revealing a unique birthmark on his scalp. Claire Fraser (Caitriona Balfe) confirms this is genetic, which leads Roger to shave his head as well. He has the same birthmark on his head, confirming Jemmy is actually his biological son.
Well, at least until Bonnet wants to seal their agreement with a kiss, at which point he realizes Brianna has no real feelings for him. Unfortunately, he reacts in the worst way possible: by forcing Brianna to watch him have sex with a prostitute, and then selling Bree to a business associate for six pounds.
That's when a birthmark is noticed on Jemmy's head; a birthmark that is identical to one Roger has. This is the proof that Roger and the others need. It's a biological birthmark, meaning Roger's genes have passed it on. This is Diana Gabaldon's way to make it clear that Roger is Jemmy's father.
After being turned over to the Red Coats, Roger was strung up as an example of what happens to rebels. In the waning moments of the episode, Jamie, Claire and Brianna found Roger's body hanging from a tree by a noose. “Outlander” airs Sundays at 8 p.m. on Starz.