1x09: Welcome Aliens
1x07: The Green Glow
1x06: Sexy Beast
1x05: Love Language
1x03: Secrets
1x02: Homesick
1x01: Pilot
51x07: Secrets in Your Data
51x06: Great American Eclipse
51x05: A.I. Revolution
51x04: Hunt for the Oldest DNA
51x03: Building the Eiffel Tower
51x02: Easter Islands Origins
51x01: When Whales Could Walk
50x18: Lee and Liza's Family Tree
50x17: The Battle to Beat Malaria
50x16: Inside China's Tech Boom
50x15: Ancient Earth: Humans
50x14: Ancient Earth: Inferno
