Netflix’s colonization of international television continues with the debut Friday of the eco-thriller “The Rain,” the first Netflix-financed series made in Denmark. Other streaming services have strong footholds in the wide territory of Scandinavian TV, too, and “The Rain” is one of three premieres in a four-day stretch that offer a short historical primer in Nordic drama.

“The Court”

If you’ve watched a 2015 Icelandic mystery called “Case” on Netflix, you probably wondered what the deal was with Logi (Magnus Jonsson), the burned-out lawyer whose background was barely sketched in. It was as if we were already supposed to know his story.

It turns out we were, and now we can watch it thanks to Walter Presents, which offers the first season of the legal drama “The Court” (“Rettur”) — the landmark Icelandic series later rebooted as “Case” — beginning Thursday.

Released in January 2009, just a few months into the small nation’s great financial crash, “The Court” appears to have some of the energy and melodramatic verve of the David E. Kelley courtroom shows that came just before it, like “Boston Legal” and “The Practice.” (Walter Presents made only one of the season’s six episodes available.)

“Arne Dahl”

There’s no one in “Arne Dahl” named Arne Dahl. It’s the pen name of Jan Arnald, the writer whose series of 10 crime novels was turned into the two seasons of this Swedish cop drama. All 20 episodes — two per mystery — will soon be available on MHz Choice, which began a weekly release of Season 2 on Tuesday.

“Arne Dahl” and the excellent Swedish-Danish series “The Bridge” both came out in 2011 and shared a production company, Filmlance International. But they’re like two sides of the police-procedural coin. “The Bridge” (available on Hulu) was thoroughly up-to-date, devoted to deep psychology and complicated season-long plots. “Arne Dahl,” about a six-person team called (perhaps with a touch of mordant Swedish humor) the A unit, is a throwback, with its large, chatty ensemble and its old-school self-contained, movie-length mysteries.

There was a four-year gap between seasons, and Season 2 of “Arne Dahl” is more polished — brighter and tighter — but offers the same rewards of copious investigative detail, numerous bloody deaths and lightly clichéd but pleasantly performed personal drama.

“The Rain”

Netflix’s new Scandi-drama brings us to the present in more ways than one. It’s engineered for current TV trends and specifically for what appear to be Netflix’s appetites: a postapocalyptic sci-fi-and-horror blend with an environmental theme and a cast of attractive teenage and twentysomething survivors.

The eight-episode first season (three were available) gets off to a breathless start. A pair of scientists snatch their daughter, Simone, from high school and take her and her young brother, Rasmus, to a bunker in the forest just before a virus-carrying rain starts to fall over Denmark. The parents know what’s up, but they’re gone before they can provide answers.