The classic triad of ataxia, dementia, and urinary incontinence is an increasingly recognised and potentially reversible cause of dementia seen on geriatric wards. The exact pathogenesis is unknown, although many theories have been proposed that could account for the condition. Normal-pressure hydrocephalus is often missed if it is not suspected or considered. There is no medical treatment, but surgical placement of a ventriculoperitoneal shunt can be helpful; however, as with all surgery, inherent complications exist. The greatest challenge is perhaps not diagnosing normal-pressure hydrocephalus but recognising those patients who will benefit from ventriculoperitoneal shunting.