The FBI think they have a mole, so an investigation gets underway, and it puts Alex at war with his own ethics. Elsewhere, Victor devises a new method for staying on top of the O'Connors and Natalie makes a grievous error while searching for a lead.

Victor spies on the Rezident, Alex reveals a big secret to Michelle, and Sam grows increasingly suspicious of the boy genius.

Michelle's shooting puts Alex at odds with the task force. The Black Dagger triggerman makes his next move.

Wanted in connection to Michelle's disappearance, Alex accepts help from an unlikely ally. Natalie and Victor adjust to life on the run.

The whole O'Connor clan go on the run, trying to escape both the FBI and the SVR while also plotting to expose Faber as the FBI mole.