From IMDB;
During a snowy Christmas season in Sweden, psychologist and profiler Inger Johanne Vik and her autistic daughter both get drawn into the investigation of a number of disturbing deaths.
From PBS Masterpiece Streaming you can stream the 8 episodes of this Swedish mystery series. Each episode lasts about 45 minutes.
Just because the villain intends to kill multiple victims does not, as I understand the term, make the villain a serial killer. Rather in this well-done series his motive has a homicidal rationality. But I will leave it up to you to guess for yourself that motive before the profiler Inger Vik realizes what is happening.
Many well-presented characters interact. Throw a romance into the pot and the result is successful suspense.
DO NOT MISS!