It's a BBC iPlayer French subtitled Canal+ (No incest I promise) that is about a WW1 solider who gets injected with something and takes on the whole German army.
Following a good write up in the Guardian I started watching and I’m about 4 episodes in and enjoying it, has a bit of a Peaky Blinders/Steam Punk feel to it.
Have a theory on who their German equivalent is but waiting to see if I’m right.
Finished the series this week and was disappointed that there wasn’t more episodes but, as AnotherHamster says, well setup for the next series as there’s lots of unanswered questions.