From Variety:

This week’s episode, “The Happiest Place On Earth,” features a devastating parting of ways. These two families, the Frasiers and the MacKenzies, are going to be broken apart by hundreds of years, and just after Brianna has given birth to her daughter, Amanda. How does this rank in terms of sad goodbyes on the series, which are, unfortunately, a common occurrence?

CAITRIONA BALFE: I think that the joy and the absolute thrill of Brianna having a new kid, and everyone being able to be present there for that new life coming into the family — that was such a high. And then for the fear and the worry to come in when they realize that there’s actually something wrong with Mandy, and the implications of that and what that means. There really was only one solution, and that was for them to go back to save her. But it’s a death. It’s like they know that this is the final goodbye, or they think it’s the final goodbye.

Saying goodbye in that way, I think this is where we start to see Jamie and Claire be so vulnerable. They are left, and they are the only things, really, that they have — it’s just the two of them together. That goodbye was really sad. And it just meant that we weren’t working with Richard and Sophie for ages.

Right. The show could go in so many places, but as of right now, your characters are separated, and who knows if they’ll reunite.

RICHARD RANKIN: It was such a long process getting to that point — for our characters, for ourselves, for the show — to have everyone united, and be a solid, united front. Then to have to turn around and say goodbye, and finally go back to the future. I think [Roger and Brianna] had very much accepted the 18th century as their home. When they got spit out at the stones [in Season 6], they were like “We belong here. Our family is here. Our life is here. We can truly be happy here. There’s a place for us here.”

Read the full interview here.