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• S12.E1 ∙ Glue
• S12.E2 ∙ F/A-22 Raptor
• S12.E3 ∙ Machines of D-Day
• S12.E4 ∙ John Hancock Center
• S12.E6 ∙ Secret Japanese Aircraft of WWII
• S12.E7 ∙ Secrets of Soviet Space Disasters
• S12.E8 ∙ Cowboy Tech
• S12.E9 ∙ Sewers
• S12.E10 ∙ Lube Job
• S12.E11 ∙ Secret Luftwaffe Aircraft of WWII
• S12.E12 ∙ B-2 Bomber
• S12.E13 ∙ Nature Tech: Lightning
• S12.E14 ∙ HMS Victory
• S12.E15 ∙ Cereal: History in a Bowl
• S12.E44 ∙ Civil War Tech
• S12.E51 ∙ World's Longest Bridge
• S12.E52 ∙ Secrets of the Acropolis
• S12.E53 ∙ Forensic Science: The Crimefighter's Weapon
• S12.E55 ∙ The M-16
• S12.E56 ∙ Las Vegas
• S12.E57 ∙ Oakland Bay Bridge
• S12.E58 ∙ Battlefield Engineering
• S12.E59 ∙ Transatlantic Cable
• S12.E60 ∙ Copper Kings
• S12.E62 ∙ Guns of the Civil War
• S12.E63 ∙ High Explosives
• S12.E64 ∙ B-25 Bomber
• S12.E67 ∙ Space Shuttle
• S12.E70 ∙ Statue of Liberty
• S12.E71 ∙ More Earthmovers
• S12.E72 ∙ Firefighting!: Extreme Conditions
• S12.E74 ∙ Panama Canal