"We both found this world to be just about familiar but unsettling," Heughan teases to TVGuide.com. "It's less weapons. It's more politics, more backstabbing and darkness. There are some pretty dangerous characters involved."
One of those dangerous characters is Stanley Weber's Comte St. Germain, who Balfe says Claire will run into almost immediately, thanks to "her big mouth."
See who else Jamie and Claire will go to toe to toe with when Outlander returns April 9 on Starz.