2
- Episode aired Sep 20, 2021
- 44m
![Submarine: Life Under the Waves (2021)](https://m.media-amazon.com/images/M/MV5BYTAxZWJjY2UtOWFhOC00YjIxLWFkMmYtN2UzY2NhN2YzMGZiXkEyXkFqcGdeQXVyMDc1Njk5MA@@._V1_QL75_UY281_CR4,0,190,281_.jpg)
Captain Stephen Brian takes command of HMS Trenchant. His arrival coincides with a growing threat from Russia, as their warships and submarines make forays into British waters.Captain Stephen Brian takes command of HMS Trenchant. His arrival coincides with a growing threat from Russia, as their warships and submarines make forays into British waters.Captain Stephen Brian takes command of HMS Trenchant. His arrival coincides with a growing threat from Russia, as their warships and submarines make forays into British waters.