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• S3.E1 ∙ Air Force One: A History
• S3.E2 ∙ Brooklyn Bridge
• S3.E3 ∙ Tunnels
• S3.E4 ∙ The Tennessee Valley Authority
• S3.E5 ∙ Satellites
• S3.E6 ∙ Radio: Out of Thin Air
• S3.E7 ∙ The Search for the Polio Vaccine
• S3.E8 ∙ The Stock Exchange
• S3.E9 ∙ Transcontinental Railroads
• S3.E10 ∙ Earthmovers: The Power to Move Mountains
• S3.E11 ∙ Deep Sea Exploration: Challenging the Abyss
• S3.E12 ∙ The Alaskan Oil Pipeline