NBC is giving two midseason comedies, Trial & Error and Great News, The Voice lead by scheduling them back-to-back in an hourlong block. Meanwhile, the third new NBC midseason comedy series, the DC Comics-themed Powerless, will air behind Superstore on Thursdays. NBC’s midseason Thursday lineup also will include The Blacklist spinoff Redemption subbing for the mothership series in the 10 PM hour. Meanwhile, cop drama Shades of Blue starring Jennifer Lopez, which aired in…