NBC has dropped its fall lineup and there is good news in it. The three hour “Law & Order” block returns on Thursdays with “Law & Order: Organized Crime,” “Law & Order,” and “Law & Order: SVU.” “St. Denis Medical” returns to Mondays and “Happy’s Place” remains on Fridays. New comedies “The Fall and Rise of Reggie Dinkins” starring Tracy Morgan and Daniel Radcliffe and “Stumble” get their shot this fall.