Jack and Mike head to a mysterious, abandoned outpost in Russia to seize the Sokol nuclear device, but an unexpected visitor foils their plans. Meanwhile, Petr seeks to rescue Alena,…

Jack travels to Vienna to track down the source of his original intelligence on Sokol. Greer advises Alena on a key NATO deal. Petr Kovac, Alena’s father, hosts a hunt…

In Budapest, Jack and Mike plan a sting on a slippery arms dealer to ascertain the whereabouts of the Sokol nuclear device, as Greer discovers some intriguing and potentially incriminating…