Time Travelers

Fanny is happy with the new and goes to Jane's cairn to interact with her. While there, she finds an emerald. When she picks it up it becomes hot to the touch and she drops it. Then she hears the buzzing of the stones. She's a time traveler.

If Jane is the daughter of Faith and granddaughter of Claire and sister to Fanny (who feels the warmth of the gemstones), could she have time traveled?

Julia gives birth to Henry's baby but is passing it off and Simon Fraser, Lord Lovat's child. She secretly names him William. We are unsure if he can travel but considering both his parents are able and his sister Claire is able, we can assume he can travel. Source: luceo non uro

Henry Beauchamp is on his honeymoon in Scotland with his new wife Julia when they are in a car accident and nearly swept away. The two manage to get to safety but find themselves and Craigh na Dun. Julia disappears first. When Henry attempts to look for her; he inadvertently touches the stones and is also transported back in time. Henry searches the area around the stones for Julia but has no luck. He leaves the message S.W.A.K. or Sealed with a Kiss for her on a rock.

Julia Beauchamp is on her honeymoon in Scotland with her new husband Henry when they are in a car accident and nearly swept away. The two manage to get to safety but find themselves and Craigh na Dun. Julia disappears first, awakening in the past. When she attempts to find Henry she meets up with some locals who kidnap her and take her to Lord Lovat to be sold into servitude.

In the show, Faith survived because of Master Raymond (I know! GRRR). And when we learn Fanny can hear the stones that suggests Faith could have time traveled as well.

After being shot down, Jerry took a leave to recover from bullet wounds and was recruited by Intelligence Officer Frank Randall. Jerry and three other pilots are tasked with flying low over concentration camps to take phones with cameras mounted on their wings. Before the mission, Jerry is flying in Northumberland when his plane suffers engine failure and he goes down. He's thrown from the wreck near Craigh na Dun. When he comes to he leans on one of the stones for support and is transported into the past.

Roger finally discovers who the Nucklavee is when he finds William Buccleigh “Buck” MacKenzie lurking around Lallybroch in the 1980s. Buck heard Craigh na Dun buzzing sound while passing and went to check out the noise only to be sent forward in time. After arriving he saw Roger and Brianna and followed them back to Lallybroch where he's been getting the children to give him food. Roger and Brianna aren't that happy with Buck because he is reason Roger was hanged. Buck is confused by what happened to him and Roger and Brianna explain they are all time travelers and that Roger his he many times over grandson. Buck's attitude seems to change and he is invested in what happens to the MacKenzies.

While ministering to soldiers, Roger tells a man who asks for advice, "Float like a butterfly, sting like a bee." A man among the conscripted says, "Ali," as he recognizes the quote from the future. Roger is stunned to find a time traveler. Wendigo Donner introduces himself and asks Roger for help. He has a gemstone and just wants to go back to his own time, but needs help escaping. Roger talks with Brianna about this and ultimately decides he can not help Donner escape. Source: A Life Well Lost

Who is the man in the jail? He stole one of Flora MacDonald's emeralds from her necklace which suggests he was actually after the stone and not the necklace. As we know, gem stones are needed for steering and protection through the stones. Claire hears him whistling “Colonel Bogey March” which was a song that came about in 1914 but became the anthem of WWII. This proves the man isn't from the 18th century. Source: Give Me Liberty

Claire encounters Wendigo Donner while in the captivity of Lionel Brown and his men. After confirming she’s from the future he says he traveled back in time with a group of American Indians in 1968. She tells Donner of Otter Tooth’s (Robert ‘Bob’ Springer) fate but Donner is confused because they came back to save their people. Donner wishes to go back to the future and Claire promises to help him for helping her but he doesn’t. Source: Never My Love

Jemmy is drawn to gemstones because of a noise they make. However, when playing with Claire’s opal (Otter Tooth’s); he claims it is hot. Brianna, Roger, and Claire feel it’s warmth though Ian and Jamie do not. While holding the stone it breaks apart causing a sound much like the standing stones which only travelers can hear.

The Mohawk tell Jamie, Claire and Ian about Otter Tooth (the previous owner of Claire's stone). He appeared to know the future. He told the Mohawk of the future. He tried to convince them to war on the white man going so far as to scalp some nearby. He angered the elders who sent him away but he was always nearby ranting and raving. They thought him possessed and chased him for days until they caught up to him and killed him. They continued to hear his words even after taking his head and so buried his head far away, under a tree where Claire eventually found his skull and satchel with the opal inside.

As Roger is a descendant of Geillis Duncan he also can hear the calling of the standing stones. Fiona takes him up to Craigh na Dun so he can follow Brianna. Fiona can not hear the stones.

Claire tells Roger he is related to Geillis Duncan who she met after traveling back to 1743. Geillis was to be burned as a witch after she gave birth to the child she carried. Claire knew the child was Dougal’s and tells Roger his genealogical chart is wrong when it gets back to that point in history and that he is the descendant of Geillis Duncan and Dougal MacKenzie. Source: Dragonfly in Amber