Alex inspires Sam to threaten 'logistic facilitator' Oleg Zhulov with release within Russian reach and traitor reputation to betray Oscar's aliases, and provide FBI surveillance at the family home for his sisters. Viktor seeks fat-cat KGB prince Uri Adulov's agreement to eliminate the resident, in vain, so kills him and gets the blessing of a Russian intelligence officer and seduces his undervalued deputy Arkady Isakof to switch sides. Alex finds Oscar's lab lair, but Sam's party walks into a fatal booby trap. Alex is traumatized, yet his father gets him to set up another trap by identifying the links between Oscar's travels, his pregnant New York lover Elizabeth Simpson, but again the assassin's bloody cruelty proves too efficient, even over love, leaving them only her files as clue where Black Dagger is likely to strike most deadly.
—KGF Vissers