A boy named Angel is found wandering in the desert, and when another boy turns up missing, the BAU searches for the kidnapper.
NCIS investigates a ring of clever teenage partygoers when a string of break-ins takes place at Marine Base Quantico. While working the case, Special Agent McGee forms a bond with one of the teens, Teagan Fields.
When Team Scorpion and Walter's parents visit Megan in the hospital as her health deteriorates, they are quarantined after a deadly fungus outbreak threatens to infect everyone.
Ochoa volunteers the team to assist with a covert operation aimed at taking down a terrorist group.
Will earns the respect of his new colleagues. A Resistance attack comes to the home front and brings the Bowman family together. Katie gets to know Will's team. Maddie finds a new job that makes the most of her talents.