 Viktor steals a residue sample of the bomb used and his scientist friend Tonkin (Valentin Ganev) tells him that the explosive used, Semtex H, has a direct traceable link to the FSB.Tonkin is soon killed by Vladimir Dorganosov (Tom Wlaschiha), the man who attacked Komarov industries and stole the bioweapon.Sonia and Andrei locate Leonid Zaitzev (Theodor Danetti), a cleaner who worked at the Komarov Industries plant and saw Dorganosov steal the virus.