Scandinavian mystery fans: Netflix has Season 2 of the original Swedish "Wallander"
(Season 1 has shown on MHz Worldview TV) and two Danish thriller series called "The Eagle" and "The Protector." "The Eagle" did not have subtitles when I view it on my older Roku, but they show up just fine on the iPad.
Other non-American, non-English mystery series include "The Murdoch Mysteries" (set in 1890s Toronto), "Spiral" and "Crimson River" (French), "Taggart" (Scotland), and "Quiz from God" (Korea). Watch for "Proof: Prescription for Murder" (Ireland) to reappear.
On Hulu, you can find "Single-Handed" (Ireland) and "Verdict Revised" (Sweden), as well as more Korean dramas than you could ever have time to watch.