Outlander Trading Cards Season 4 sees Cryptozoic Entertainment heading to pre-Revolutionary War America with the hit Starz adaptation of Diana Gabaldon’s series of Outlander novels. Season 4 of Outlander found the heroes of this beloved time-traveling, swashbuckling romance saga making a new home in 18th century America, dealing with the wilderness, Native Americans and a visit from their daughter from the 1970s. This season was based on the fourth book in the Outlander series, Drums of Autumn.