Ooh, I loves me a bit of bleak submarine-based drama – and the UK can be really good at doing bleak, although in a different way to Das Boot.  This was a gripping 6-parter which had us counting down the days til the next episode aired, and upped the already high ante of being on a submarine with a little mental health drama, some onshore political intrigue, and a plotline that twisted and changed like a chameleon dropped on a BBQ plate. 👍👍

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