The Great Underground War - 2015 - 5/10
5 part documentary on tunnel warfare during World War I.
Talking heads (of varying value), reenactments, maps and vintage newsreel footage.
Mine techniques, explosion strategies, counter tunnels, and the heavy death toll.
Three episodes cover the western theaters of Verdun, Ypres, and the Somme.
The final two were of more interest to me, covering the Alpine war between Austria and Italy.
Indeed, the fourth episode featured no tunnels, just mountaineering warriors.
Possibly for war or history buffs, this felt padded to me.
E17 of The Great War (1964) covered the underground war succinctly in 15 minutes.