A lot of fun to watch for the first 2.5 seasons, then it turns dark, but not in the same sleazy way as most other detective shows when they run out of ideas (fiendish deranged master criminal obsessed with torturing the detectives and their families). It's still very well done, but the later episodes are disturbing/depressing rather than fun. Nobody seems to have more than the first four seasons. Not even Acorn. Nine seasons exist. The Roku Channel claims to have seasons 1-8, but it's really "Acorn on the Roku Channel" and if Acorn doesn't have them then how can Roku?