The third season of NBC's Civilization aired on January 15, 2018 and concluded on August 26, 2018.
In a fictionalized version of Earth, the nine civilizations from last season deal with new revelations, old secrets, and the presumed deaths of Viktoriya, Christophe, and Gong.
- Sadao Abe as Takuya Maruyama, the Japanese shogun.
- Cassandra Scerbo as Adrienne Girard, the French empress and Christophe's daughter.
- Rosyam Nor as Kong Shen, a Chinese knight.
- Penn Badgley as Harry Colonomos, the Greek king.
- John Patrick Amedori as Jordan Palmer, the latest American president.
- Connor Jessup as Foveri Demetriou, the Greek executioner.
- Zendaya as Haruka Sakai, a Chinese warrior.
- Matt Angel as Yulian Venediktov, a Greek soldier.
- Salma Hayek as Violeta Mendez, the Spanish queen.
- Taron Egerton as Alexei Novikov, a Russian priest.
- Aaron Aziz as Hiro Sugawara, the Japanese emperor.
- Deepti Naval as Jagriti Chanda, the Indian prime minister.
- Sharon Stone as Mary Vlahos, a royal Russian lady.
- Jamia Simone Nash as Isabella Lopez, a Spanish dancer.
- Ryo Nishikido as Itasan Kato, a Japanese playwright.
- Avan Jogia as David Young, an American politician.
- Rose McIver as Kiara Pollard, the English queen.
- Derek Theler as Matheo Guerin, a French prince.
- Shane West as Christopher Griffiths, an English soldier.
- Ryan Robbins as Ethan Harrison, an American father.
- Scott Adkins as Daniel Brun, a French father.
- Amy Acker as Melissa Brun, a French mother.
- Callan McAuliffe as Erik Demidova, the Russian prince.