Holmes and Watson's investigation into the murder of a religion professor puts them on the hunt for a killer connected to the occult. Also, Holmes and Watson curate a list of potential replacements for Detective Bell when it looks likely the officer will be asked to join the U.S. Marshal Service.
Abe's colleagues must defend - and reluctantly prosecute - him when he is arrested and court-martialed for mutiny in regard to a 2010 mission in Afghanistan where he was one of the only survivors.
Abe and Harper travel to Afghanistan to investigate when an Afghan commander is killed on a U.S. base. When a Marine is accused of the crime, Trey and Maya join their colleagues to defend him in an on-base hearing. Also, Col. Turnbull and her husband, Asa (Cotter Smith), disagree about how to handle their son Adam's (Derek Klena) physical therapy.