Episode 01: When Whales Could Walk Episode 02: Easter Island Origins Episode 03: Building the Eiffel Tower Episode 04: Hunt for the Oldest DNA Episode 05: A.I. Revolution Episode 06: Great American Eclipse Episode 07: Secrets in Your Data Episode 08: Decoding the Universe: Cosmos Episode 09: Sea Change: Bounty in the Gulf of Maine Episode 10: Sea Change: Peril in the Gulf of Maine Episode 11: Sea Change: Survival in the Gulf of Maine Episode 12: Solar System: Storm Worlds Episode 13: Solar System: Strange Worlds Episode 14: Decoding the Universe: Quantum Episode 15: Building Stuff: Boost It! Episode 16: Building Stuff: Reach It! Episode 17: Decoding the Universe Quantum Episode 18: Lost Tombs of Notre Dame Episode 19: Building.Stuff.Reach.It Episode 20: Building.Stuff.Change it Episode 21 Episode 00: (special) Sea Change: Peril in the Gulf of Maine