B.B.'s arrival in Berlin is met with mixed emotions. April attempts to get Sofia back into the fold, but is violently thwarted by Sergei, an operative involved in the Estonia gambit. April escapes alive, but Sofia is nowhere to be found. Esther wants to find Daniel, but Valerie stonewalls her, so she enlists Frost to track down Daniel while Torres and Kirsch follow their own lead in Vienna. There, they discover an arms dealer who sold an arsenal of weapons to Vassily Krik, a high-ranking Russian oligarch, who may be holding Daniel Miller alive.