From Radio Times

“It’s a lot darker. There is some amazing stuff,” Heughan tells RadioTimes.com, adding that we’ll see the relationship between Claire and his character Jamie Fraser “develop a lot.”

“It’s no spoiler for those who have read the books, but Jamie goes to a really tough, dark place. It’s really exciting viewing. I think it’ll be challenging for some people but I think it’s really fun to watch.”

More of the interview after the jump

We left Claire and Jamie at the end of episode eight as newly-weds, trying to navigate Scotland’s dangerous Highlands, and the tricky terrain of a marriage neither of them explicitly chose. It seems life isn’t going to get much easier for the pair.

“At the end of season one their relationship is in a very strange place,” Heughan reveals. “It’s been tested a lot, it’s got stronger but it’s been taken to some very hard places. I think that’s the fun. It’s like any marriage – you’re constantly learning about each other and how to work together.

With plenty of source material published by Gabaldon, the characters have a long journey to go on if Starz continue to give the TV series its backing (a second season has already been commissioned, announced before the first had even aired). “We’ve got eight books, hopefully we get to film eight books,” says Heughan.

“We go back at the end of spring to shoot another 13 episodes which is book two, partly set in France, partly set in Scotland,” he says, adding: “I think season two is going to be very different.”

Read more over at the source