The chapter reviews the past literature on this topic, identifies some areas where Eastern religious cults may impact our life in the West, and also raises new questions and ideas for future scholarship. The study of all cults has been hampered by problems of definition and such problems (Eurocentric bias, Orientalism) are even more relevant in the study of Eastern religion. We review religious cults from three contrasting parts of the East, including the Middle East, South Asia, and East Asia. We review a true Western court case in which a mental health defense (insanity) was indirectly inspired by the theology of an Eastern religious cult after the defendant admitted killing, but claimed “God told me to Kill!” This raised new questions for the forensic psychiatrists in the case, who found it difficult to accept the unpopular “cultish” view that God may indeed command one to kill. Whereas some Western religious cult leaders are available for psychiatric interview in the West, most Eastern ones are not so available, so our knowledge of their characteristics is based less on rigorous psychiatric interview, and more on soft historical records, often written by their enemies and therefore of questionable value. Lastly, we review some differences between Western and Eastern psychology / logic, which may be relevant to the dynamics of the seduction process for indoctrination into an Eastern religious cult.