The Mercury goes into silent running mode and follows the Potomac in her blind spot. Meanwhile Gabby is onboard the Potomac in the ship's brig but escapes to learn what her fate is. Barnes tells the group that Colonel Corsky is being transferred to what was formerly called Ft. Sam Houston. Plans are made for some to go there and investigate. Simon and Kate return to MI6 headquarters in London to learn more about their future.

Gabby boards the Potomac to hunt for WiFi's remains but is captured by R.A.G.E. In Kiev, Anton strikes a deal with Dmitri and Kate and Agent Simon are free to return home. Barnes meets with Thornton to discover news about Corsky.

Jaffra's team traces a clue to the New Market bar where they learn WiFi's remains are being smuggled aboard a former IDF vessel the Potomac. Gabby hatches a daring plan to sneak on board and retrieve it. Kelly and Barnes visit a rental agency at the airport to track down his assailant. Jamison heads back to London to be with his mother while Anton strikes a deal with Dmitri.

On Cali, the team discovers clues as to the location of WiFi or his remains. It leads them back to the bar JoMac and Marco had visited earlier. Barnes and Garrett's team continue to go thru the evidence they found in South East DC while Pearman offers new clues. And in Kiev, Jamison confronts Dmitri in the Crabs and Burgers restaurant.

Jamison is tracking Dmitri through Kyiv and finds him before the others. In DC, Barnes and crew are looking for clues to lead them to the two men who attacked Barnes. On Cali, Gabby struggles to override Georgia who has locked them out of the Mercury.

Barnes recovers from an assault and searched for clues as to who attacked him. Jaffra and the Mercury crew search the old hospital for any sign of WiFi only to get a big surprise when they return to their ship. Anton and the Simon team search the abandonded car used by Dmitri then set out on foot to search for him.

Jaffra and crew have traversed the jungle to find the downed RAGE helicopter. They find a live crew member, will he talk? In D.C. Garrett crew continues to investigate the mysterious Col. Corsky while Agent Barnes tracks a new lead from Thornton. In Kiev, Simon, Kate and Jamison follow Anton as he is about to meet his Russian Handler.

Jaffra and his team are attacked at the New Market abandoned hospital and give chase. Barnes asks his old police unit for help in the Corsky case and Anton will confront Dmitri.

Agent Simon's crew recovers from the drone attack and make plans for Dmitri. Jaffra's crew investigates the old New Market hospital while JoMac's team investigates thew bar where WiFi's rumor started. Meanwhile Garrett and company try to find the real identity of Col. Corsky

Simon and company are closing in on Dmitri. The Controller issued a warrant for WiFi Dead or Alive and Corsky's past is very muddy