This case report describes a patient with Huntington's Disease (HD) who allegedly stalked her therapist. The patient developed recurrent thoughts about her therapist as well as amorous feelings towards her therapist. She engaged in stalking behavior including unwelcome gifts, multiple telephone calls to the therapist's office and home, and making threats towards the therapist. The patient continued to contact the therapist after the therapist filed a Personal Protection Order. The patient was successfully treated with risperidone and fluvoxamine. Through a focused review of the relevant literature, the authors explore the potential relationship between the patient's obsessional thoughts, amorous feelings towards her therapist, the basal ganglia dysfunction, and the stalking behavior. The authors posit a hypothesis of stalking as a novel early manifestation of HD in this patient. To the best of the authors' knowledge, this is the first reported case of stalking occurring with potentially causal organic lesions.