Filming location is in Luleå, Sweden for securing winter with real snow and ice. In the real life there is not typically lot's of snow and ice in Åland in winter. There are not many big pensionats in Åland. Waldemar's Pensionat in reality is 500km north from Åland

In contrast to the Nordic noir crime stories that dominate TV exports from Scandinavia, Thicker Than Water focuses on familial, not criminal, dysfunction.

ZDF Enterprises picked up remake and format rights for the show, which they pitched to broadcasters at MIPTV, which ran April 6-10 in Cannes.

Jonna Järnefelt (Beatrice Norling) & Tobias Zilliacus (Mikael Rosén) also worked together on Deadwind (2018) as Linda Hoikkala & Ossi Rannikko respectively.

Thicker Than Water premiered on Swedish public broadcaster SVT, where it drew an average share of 29 percent in prime time.