一边：葛雷博死后，斯巴达克斯和部下带领的克雷斯、甘尼克斯和艾力冈等带领下的奴隶起义军在向罗马进军的途中取得连续的胜利。解放后获得自由的奴隶们大多加入了这支军队，使得整个奴隶起义军的力量越发壮大。一步一步地威胁着罗马的统治。
Returning from France, Jefferson strives to preserve the fragile new U.S. government and helps create the first political party, in bitter struggles with the Federalists. He becomes vice president in 1797, and the third U.S. president in 1801. His Louisiana Purchase doubles the nation's size, but he faces controversy and scandal, finally retiring to his beloved Monticello in 1809. His last years are spent founding the University of Virginia.
克里斯利家的兄弟姐妹们在父母入狱后逐渐适应新的生活，萨凡纳一边抚养年幼的弟妹，一边寻求正义，而蔡斯则要应对个人挑战和新的商业冒险。
J.D.（扎克·布拉夫 饰）、Chris Turk（唐纳德·法森 饰）和Elliot Reid（萨拉·乔克 饰）三位原班老友再度集结，重返熟悉的圣心医院。新旧两代医生擦出意想不到的火花，在无数个爆笑、疯狂但又触动心灵的瞬间之中，开展全新篇章。
