Sherlock and Watson investigate a child abduction case involving a serial killer known as The Balloon Man, who leaves signature balloons at each of his crime scenes.
When a group of highly trained Army veterans robs a bank, Danny feels conflicted; a street artist is responsible for a bomb scare in a subway.
After a shocking event occurs on American soil, Elizabeth must answer President Dalton's questions about how it happened.
Bull feels the weight of past failure in a Texas town where he works on a drug patent case for a young woman.
Chunk's friend Reggie, an elite boarding school's counselor, asks Bull to help the parents of an athletic scholarship student bring a wrongful death suit against the school, after their teenager dies suddenly while training.