In the 19th and early 20th century, epilepsy was one of the most investigated disorders in forensic psychiatry and psychology. The possible subsidiary symptoms of epilepsy (such as temporal confusion, alterations of consciousness, or increased aggression) played pivotal roles in early forensic and criminal psychological theories that aimed to underscore the problematic medical, social and legal status of epileptic criminals. These criminals were considered extremely violent and capable of committing sudden, brutal acts. Although the theory of "epileptic criminality" was refuted due to 20th-century developments in medicine, forensic psychiatry, and criminal psychology, some suppositions related to the concept of epileptic personality have lingered. This paper explores the lasting influence of the theory of epileptic personality by examining the evolution of the theories of epileptic criminality both in the international and the Hungarian context. Specifically, it calls attention to the twentieth-century revival of the theory of epileptic personality in the works of Leopold Szondi, István Benedek and Norman Geschwind. The paper shows that the issue of epileptic personality still lingers in neuropsychology. In doing so, biological reductionist trends in medical-psychological thinking are traced, and attention is drawn to questions that arise due to changing cultural and medical representations.