If you have additional recommendations for famous northwestern continental mystery novelists from the last two centuries I'd love to hear (especially interested in German, Dutch, Belgian, and Luxembourgish authors).
Novels from Nordic and British Isles authors have been easier for this American to discover.
The trailer for "Night at the crossroads."
By the way Jean Marais's movies while being not very related to the books are excellent in being very hilarious genre parodies.
So the Martin Beck novels by Sjowall / Wahloo are probably on your radar then, for mystery fans that have not seen them they are worth reading.
Also Seishi Yokomizo is a Japanese mystery author that may appeal to Christie fans
Great acting, music, recreation of the era, awesome attention to detail and of course delightful mysteries.
It sets the bar very high, to the point it has alas kind of ruined "other Poirots" for me.
But, yes, before that, absolutely wonderful!
More than just the music, the opening animation is iconic.
I couldn't find an answer immediately so I'll just wonder about it in here as well and see what happens :)
Never seen the TV show, but if you can get past the language of the books you can’t beat them.