S12 E1: Edgerton and His Incredible Seeing Machines

S12 E2: Global Village

S12 E3: Conquest of the Parasites

S12 E4: In the Land of the Polar Bears

S12 E5: AIDS: Chapter One

S12 E6: The Shape of Things

S12 E7: Baby Talk

S12 E8: The Mathematical Mystery Tour

S12 E9: Child's Play: Prodigies and Possibilities

S12 E10: Monarch of the Mountains

S12 E11: The National Science Test II

S12 E12: Seeds of Tomorrow

S12 E13: What Einstein Never Knew

S12 E14: The Robot Revolution?

S12 E15: The Magic of Special Effects

S12 E16: Child Survival: The Silent Emergency

S12 E17: Tornado!

S12 E18: The Genetic Gamble

S12 E19: Animal Architects

S12 E20: The Plane that Changed the World