I enjoyed this. Complicated at times, with spies and double agents etc. so you have to concentrate.
Learnt neutral Portugal is where most Tungsten or - wolframite - comes from. The allies and Germans needed it therefore - a very dense hard metal necessary for missiles and more.
Not sure I REALLY believe the plot - same as the last series. But it is fiction, so... fine. It is written by US action movie writers a lot so aims to emulate that. NOT sure I believe the shock of some at Nazi horrors (they knew, esp all in armed services). BUT... it is a story...
The weakest bits were those in English set in the UK - it's stronger when we are at sea esp on the U-boats or in Portugal. And the way the wife says they have some West Indian women at her munitions factory and they're great singers is unnecessary woke and not realistic. Yes, there were West Indian incomers in WWII esp in RAF. However, armaments factories were where white British working class women worked (so not the wife of a sea captain then - middle class women worked more in nursing and other fields). Only 350 west indians in UK armaments in WWII, What luck they all show up at this lady's bomb factory, What are the chances?
The U-boat sections and twisting plot is great. Nazi gold! 4 stars
The high quality of the previous two seasons has been maintained.
Plenty of action,but more attention to the disintegrating German war effort here of course,as it concentrates on the final years of the conflict.
Very convincing performances from all the cast too.