Season 3 Episodes20
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E1 6.2Berlin Wall
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E2 6.1Now viewingImpossible bridges: Denmark to Sweden
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E3 7.3Impossible Bridges: Greece
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E4 6.9Apache Helicopter
E5Hoover Dam
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E6 6.8Inside NCIS
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E7 8.0Impossible Bridges:China
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E8 7.0Garbage Mountain
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E9Ice Hotel
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E10 6.6Machines of War: Tanks
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E11 7.7Supertanker
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E12 7.4Machines of War: Missiles
E13 5.9How it's built: Steel
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E14 6.3Machines of War: Guns
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E15 6.5Panama Canal Unlocked
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E16Science of Bricks
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E17Science of Concrete
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E18Megafactories Ferrari
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E19Ultimate Structures: Super Pipeline
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E20Rockeaters of Iceland
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