S50 E1: London Super Tunnel

S50 E2: Star Chasers of Senegal

S50 E3: Ancient Builders of the Amazon

S50 E4: New Eye on the Universe

S50 E5: Weathering the Future

S50 E6: Chasing Carbon Zero

S50 E7: Saving the Right Whale

S50 E8: Hidden Volcano Abyss

S50 E9: Your Brain: Perception Deception (1)

S50 E10: Your Brain: Who's in Control? (2)

S50 E11: Ancient Earth: Birth of the Sky

S50 E12: Ancient Earth: Frozen

S50 E13: Ancient Earth: Life Rising

S50 E14: Ancient Earth: Inferno

S50 E15: Ancient Earth: Humans

S50 E16: Inside China's Tech Boom

S50 E17: The Battle to Beat Malaria

S50 E18: Lee and Liza's Family Tree