NOVA

Secret Tunnel Warfare Preview

Preview: Season 43 Episode 1 | 30s

In WW1 Allied troops tunneled under enemy lines to create the biggest explosion ever seen.

Aired: 12/31/15

Rating: TV-PG

The full episode is no longer available for online streaming. Why?

Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.

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