1972's "The Laughing Policeman" is all about procedure. Director Stuart Rosenberg maintains a chilly atmosphere of observation for this thriller, with stars Walter Matthau and Bruce Dern as San Francisco cops on the hunt for a killer who samples terroristic intent as he commits mass murder on city buses. Although the premise encourages hysterics, "The Laughing Policeman" keeps its cool, hoping to achieve the unexpected through patience, which allows the effort to explore rather sophisticated characterization. Read the rest at Blu-ray.com