The conclusion! With the body count growing, Callum and Aisha's road trip take them to the location on the cipher. They have a plan, but Callum's health may sideline him, leaving it up to Aisha to put the pieces together and get the evidence to arrest the Crypto-Killer. Meanwhile, Callum's evidence tampering in the original case come to bite those still in his FBI unit back home. And Brian has a fan who's interested in more than just his paintings. The past and present are resolved!