Laurel Healy reluctantly re-enters the Washington political scene when she's unable to get funding for her new Internet documentary. However, she soon discovers something sinister afoot when a woman claims that husband's personality changed after a sea voyage, and a Smithsonian doctor's head explodes.moreless
In the aftermath of the bombing, President Dalton demands answers as to who is responsible for the attack. Meanwhile, Elizabeth is concerned about Henry, who was exposed to radiation.
Fisk and Murdock grapple with the choices they've made, as Ben and Karen inch closer to the truth about Fisk's past.
A robbery is committed by Army veterans, which leads to an internal struggle for Danny. Elsewhere, Garrett and Gormley clash over how to deal with the aftermath of a bomb scare created by a popular street artist.moreless
The team receive the Number of a UN diplomat being stalked by a former government contractor. Meanwhile, Root faces an enemy from the past.
Nolan and Martina take the case of Ed Koneke, whose young daughter became sick from carbon ethylene in the groundwater. A subsequent class action lawsuit against a local chemical plant is going nowhere and Ed can no longer afford the medical bills. But when Ed takes an off-hand remark by Martina literally and punches the chemical company's CEO in the face, he finds himself on trial for assault while Martina is called as a witness for the prosecution.moreless
"The Balloon Man" who leaves a signature batch of balloons at his crime scenes, is on the loose. Sherlock and Watson, called in to consult on a child abduction case, set out to find the serial killer. But will Sherlock's signature bluntness be of any use?moreless