She said: “It is so wonderful to be able to play a relationship that keeps growing and growing, and deepening and deepening.
“I think that is something that you really see evidence of this season. It is that time and the love they have for each other keeps expanding.
“You don’t think that is possible from season one, but it really does. They are there for each other no matter what.”
Hopefully fans will see lots more of this when the sixth season finally hits screens.
Outlander seasons 1-5 are available to stream on Amazon’s Prime Video now.