Season 50
Episodes
1 London Super Tunnel Feb 1, 2023 
2 Star Chasers of Senegal Feb 8, 2023 
3 Ancient Builders of the Amazon Feb 15, 2023 
4 New Eye on the Universe Feb 22, 2023 
5 Weathering the Future Apr 12, 2023 
6 Chasing Carbon Zero Apr 26, 2023 
7 Saving the Right Whale May 3, 2023 
8 Hidden Volcano Abyss May 10, 2023 
9 Your Brain: Perception Deception (1) May 17, 2023 
10 Your Brain: Who's in Control? (2) May 24, 2023 
11 Ancient Earth: Birth of the Sky Oct 4, 2023 
12 Ancient Earth: Frozen Oct 11, 2023 
13 Ancient Earth: Life Rising Oct 18, 2023 
14 Ancient Earth: Inferno Oct 25, 2023 
15 Ancient Earth: Humans Nov 1, 2023 
16 Inside China's Tech Boom Nov 8, 2023 
17 The Battle to Beat Malaria Nov 15, 2023 
18 Lee and Liza's Family Tree Nov 22, 2023