Fans have been waiting for the reunion of the Frasier family, and it may finally happen in "Outlander" Season 4 Episode 7, titled "Down the Rabbit Hole." Starz has released the upcoming episodes' official synopsis and trailer, and it teased Brianna's (Sophie Skelton) time travel journey, along with Roger (Richard Rankin). 

"Brianna follows in her mother's footsteps and travels through the stones back in time to 18th century Scotland, where she struggles to make her way to the Colonies to find her parents," "Outlander" Season 4 Episode 7's synopsis read, per Express.co.uk. "Meanwhile, Roger follows Brianna into the past and embarks on a harrowing sea journey."

On the other hand, "Outlander" Season 4 Episode 7's trailer showed Roger and Brianna's journey as they brave finding Jaime (Sam Heughan) and Claire (Caitriona Balfe) together. In the scene, Roger told Brianna that time is not real but only a concept and a measure.

Brianna then revealed that there would be a fire, and she could prevent deaths from happening if she would go to them as soon as possible. Would it happen in "Outlander" Season 4 Episode 7?

In the next scene, Brianna and Roger went onboard a ship and arrived in a forest. He would then hear something strange and asked Brianna if she heard it. Would they be in danger in "Outlander" Season 4 Episode 7?

Talking about Brianna's journey in "Outlander" Season 4 Episode 7, Caitriona Balfe told Elle that Claire has no idea she would see her daughter again. Although Claire seemed happy that she is now with Jamie and they are now starting a new life and building a family, she couldn't help but be sad that Brianna is not around.

Being apart with Brianna causes Claire a lot of pain. Caitriona Balfe revealed that what Claire feels would be "explored and kept quite fresh" this season. Hence, it would be counterbalanced later on in "Outlander" Season 4.

Brianna's journey through the stones would get featured in "Outlander" Season 4 Episode 5. Hopefully, he would be reunited with Claire and Jaime this time. But, she still has to travel from Scotland to the New World.

"Outlander" Season 4 Episode 7, "Down the Rabbit Hole," will air on Sunday, December 16 on Starz in the U.S. while it will be out on Monday, December 17, in the UK on Amazon Prime. The season's first six episodes can be streamed and downloaded on Amazon Prime.