S49 E1: Arctic Sinkholes

S49 E2: Secrets in the Scat

S49 E3: Great Mammoth Mystery

S49 E4: Augmented

S49 E5: Determined: Fighting Alzheimer's

S49 E6: Dinosaur Apocalypse: The New Evidence

S49 E7: Dinosaur Apocalypse: The Last Day

S49 E8: Why Ships Crash

S49 E9: Ice Age Footprints

S49 E10: Ultimate Space Telescope

S49 E11: Saving Venice

S49 E12: Ending HIV in America

S49 E13: Computers v. Crime

S49 E14: Can Psychedelics Cure?

S49 E15: Ocean Invaders

S49 E16: Nazca Desert Mystery

S49 E17: Crypto Decoded

S49 E18: Zero to Infinity

S49 E19: Rebuilding Notre Dame