The previous two chapters have focused on the Israeli and Arab states' motivations for nuclear weapons acquisition. This chapter assesses the nuclear deterrent relationship existing between the Arab-Israeli adversaries. In it, I examine whether or not nuclear deterrence has worked and is still working within the context of the opaque nuclear status maintained by the key Middle Eastern states. Three salient aspects have been evaluated to provide a better understanding of the non-traditional nuclear deterrence among these opaque nuclear states in the Arab-Israeli PC. These are: the perception of non-traditional nuclear deterrence by the new nuclear states, the condition of communications used for deterrence to work, and the deterrent relationship that exists between the Arab states and Israel.