Jane and Weller go undercover as a world-class assassin couple to prevent deadly information from getting into the wrong hands. The intimate assignment draws them closer than ever. Meanwhile, David embarks on a solo mission to win Patterson back, and Carter clashes with Mayfair over how to handle a dangerous individual.

The team races to stop a corrupt DEA agent from selling stinger missiles to a drug cartel as Weller fights to keep everyone together under the increasing pressures of Jane's rift with the others and the uncomfortable addition of Nas as co-leader.

With Nas's help, Weller and Jane finally come face-to-face with Nas's inside source within Sandstorm, and square off with an old foe.

As the team chases a deadly bomber who's terrorizing Manhattan, Jane uncovers a shattering secret from her youth.

Weller and his former FBI partner reunite for a dangerous undercover mission while Zapata interrogates a past foe.

The team's desperate gambit to get Jane back puts her head-to-head with Remi.

The team discovers an international conspiracy when a deadly weapon is stolen, Jane supports Weller when someone from his past dredges up painful memories, and Patterson and Rich contend with their newly released hacker accomplice.

The team sets out on an international mission to stop an attack from spreading. Madeline attempts to turn the tables as internal conflict threatens relationships within the team.