S12E01 - Poison

S12E02 - Car Tech of the Future

S12E03 - The Arch

S12E04 - More Nature's Engineers

S12E05 - World's Biggest Machines 3

S12E06 - Blackbird Stealth

S12E07 - The Butcher

S12E08 - George Washington Carver Tech

S12E09 - Firefighting!: Extreme Conditions

S12E10 - Desert Tech

S12E11 - Sub Zero

S12E12 - The Great Bridge: 8 Miles of Steel

S12E13 - Howard Hughes Tech

S12E14 - Edwards Air Force Base

S12E15 - Taxidermy

S12E16 - SWAT

S12E17 - Deadliest Weapons

S12E18 - The Doomsday Clock

S12E19 - The Basement

S12E20 - Paint

S12E21 - Mega Movers

S12E22 - Punishment

S12E23 - Bricks

S12E24 - Glue

S12E25 - F/A-22 Raptor

S12E26 - Civil War Tech

S12E27 - Machines of D-Day

S12E28 - John Hancock Center

S12E29 - The Cape Cod Canal

S12E30 - Secret Japanese Aircraft of World War II

S12E31 - Future Tech

S12E32 - Edison Tech

S12E33 - Secrets of Soviet Space Disasters

S12E34 - Mountain Roads

S12E35 - Route 66

S12E36 - Cowboy Tech

S12E37 - Sewers

S12E38 - Challenger Tank

S12E39 - World's Biggest Machines 4

S12E40 - Dredging

S12E41 - Lube Job

S12E42 - Secret Luftwaffe Aircraft of World War II

S12E43 - The World's Fastest

S12E44 - The B-2 Stealth Bomber

S12E45 - High Risk: Helicopter Lineman

S12E46 - Wiring America

S12E47 - Nature Tech: Lightning

S12E48 - HMS Victory

S12E49 - Engineering an Empire: Rome

S12E50 - Coffee

S12E51 - Sugar

S12E52 - Cereal: History in a Bowl

S12E53 - F-117 Nighthawk Stealth

S12E54 - German Small Arms of World War II

S12E55 - The Auto Store

S12E56 - Secret Allied Aircraft of World War II

S12E57 - Engineering Disasters 17

S12E58 - Brewing

S12E59 - The Lumberyard

S12E60 - Da Vinci Tech

S12E61 - Custom Cars

S12E62 - More Hardware

S12E63 - Weird Weapons: The Allies

S12E64 - More Snack Food Tech

S12E65 - Walt Disney World

S12E66 - Nature Tech: Hurricanes

S12E70 - Private Collections