Can they make a superb series, five seasons in, even better? I rated the first episode of the fifth season of “Bosch” as 8 out of 10, high praise indeed, but the next four episodes have flowed slickly and thrillingly and emotionally, without a moment’s hesitation, so I’m upping my assessment. Harry Bosch and the extended LA police team around him keep up the slow, patient work into opioid pill farming, while a blight from Harry’s past looms as a threat. The mood of gritty realism retains a focus on modern morality. I’m on edge going into the finale half!