Astronauts train for weightlessness and fire fighters battle forest fires.
Subtitles: English
Season 4
S04:E01 - Black Boxes and More
Investigators show how they analyze the data stored on a plane's black box.
S04:E02 - Family Car, Titanium, Letter
Experts reveal how regular cars are modified to race on dangerous circuits.
S04:E03 - Forest Fires and More
Astronauts train for weightlessness and fire fighters battle forest fires.
S04:E05 - Land Mines, Air Boats and More
Massive mining machines are made to be mobile.
S04:E06 - Nuclear Submarine and More
The crew of a nuclear submarine reveal how they stay safe during a fire.
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