I didn't realize until most of the way through that this show was set in the same universe as "Into The Night". Until that point, I was thinking that it was a copy of that show, except on a submarine instead of a plane! Once the events in this show crossed over, and I had the "Oh!" moment, it all made sense and enjoyed it more.
But that's the problem--the story felt too much like a copy (and the same soundtrack?). Similar plot resulting in predictable characters and predictable outcome. It didn't really make good use of the submarine as a plot device, nor explore different characters or dynamic. Instead, we're led down the same path, with same human motivations, with characters that are very thinly developed. The story tries too hard to make a plausible beginning, more so than Into The Night. And clearly, the show's creator has an axe to grind with NATO, so the story universe is focused in Europe, and by its extension, Turkey. It seems to be self-limiting, given that the sun's destructive impact (however implausible, as it may be), affects the whole world.
Still, I can't recall more than one show based in the same story universe but in different languages/ethnicities, so perhaps that's pretty unique. And, this essentially serves as the third season of Into The Night, so I am looking forward to the fourth season (whatever the title may be called).