It's no surprise that Outlander will go to dark places when it returns this spring, but the direction the story takes might just shock fans.

'Outlander' Prepares To Go To Some 'Disturbing' Places This Season 

"[It] does go to some harrowing places," executive producer Ron Moore explained to Variety over the weekend as the cast gathered with him at PaleyFest in Los Angeles, Calif. "If you haven't read the book, you would be surprised by the direction it takes and that this is where it goes in the finale, which is a very unusual direction to take your characters in."

Based on the hit novel series by Diana Gabaldon, Outlander follows Claire (Caitriona Balfe) as she travels back through time from her life in the 1940s to 18th century Scotland.

How Role Reversal Is Making 'Outlander' A Hit 

"One of the things that attracted me to the book in the first place was that it was very unexpected," added Moore. "I didn't see any of it coming, and that's a fascinating journey to take the audience on."

The Starz program aims to remain incredibly faithful to the books, which will subsequently take the show to some disturbing places. Nonetheless, Moore claimed that "it's an ending worthy of the story."

"I'm proud of the actors and the director," he noted in regards to the season's conclusion. "I think they were very fearless on the stage and I think it comes through in the show…It's a great finale."

All around the cast admitted to being surprised by the story's direction, though they find it fascinating.

"I think where all three of us are, our relationship at the end of this season, is really a strange but interesting place," admitted actor Sam Heughan (Jamie), referring to his character as well as Claire and Jack (Tobias Menzies).

"This has been all quite a journey, really," insisted Menzies, who added playfully, "I probably wouldn't have signed up if I had known."

Outlander will return on Starz for the remainder of its first season on Saturday, April 4 at 9 p.m. ET/PT.

Tags: Outlander Starz Spoilers