...Navy. Kate Humble enters a secret world aboard a British nuclear-powered attack submarine. And former Royal Marine JJ Chalmers attempts to complete a gruelling endurance course. (S2 Ep2)[AD,S]
...Navy. Kate Humble and JJ Chalmers receive remarkable access to the Navy. Kate gets caught up in a dangerous incident as HMS Iron Duke tracks a Russian submarine at risk of exploding. (S2 Ep1)[AD,S]