I've always enjoyed the Swedish version of this and now a 3-episode English language one is out with Kenneth Branagh as Wallander.
It's somewhat unusual- set in Ystad, Sweden where the original is set, everything is Swedish, from the landscape to the characters names, however, the cast all act in English. It could have been pretentious, but I don't think it is.
This quote sums up the feel of it
'Branagh describes Wallander as "an existentialist [...] who is questioning what life is about and why he does what he does every day, and for whom acts of violence never become normal. There's a level of empathy with the victims of crime that's almost impossible to contain, and one of the prices he pays for that sort of empathy is a personal life that's a kind of wasteland'