Episodes
- S1 E1 - Breaking2
September 20, 201756minAfter six months of scientifically advanced training, three of the world’s most elite distance runners set out to break the two-hour marathon barrier.Available to buy
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- Audio languages
- English Dialogue Boost: MediumEnglishEnglish Dialogue Boost: High
- Subtitles
- English [CC]
- Studio
- National Geographic
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