In this guest episode, Jeffrey Hausdorff and Nathan Morelli speak about transcranial direct current stimulation (tDCS), its mechanisms of action, current application in research, and where the field is going in the future. In this discussion, we cover many topics which will give you insight into this area of brain stimulation. We begin with the basics of tDCS from its historic origins and therapy fundamentals. Our discussion then progresses to a deep-dive inside some of Prof. Hausdorff’s most recent works in collaboration with many world renowned researchers in neurodegenerative disease – notably including recent findings in using tDCS to mitigate freezing of gait in patients with Parkinson’s disease. We close with a look into the future of tDCS in research and clinical practice. Given Prof. Hausdorff’s expertise there are few people in the world more qualified to speak on Parkinson’s disease and non-invasive brain stimulation. As such, it is our immense privilege to present this interview to you.