Vilayanur Ramachandran has a truly outstanding, enjoyable, and insightful TEDTalk, A journey to the center of your mind. Not only should you watch it for the content, pay attention also to the form—he is a master expositor. Besides, it contains one of the most convincing debunkings of Freudian bull ever (his first example).

(Fret not about having to decipher a strong Indian accent. Aside from strong r’s, he’s extremely understandable and rather pleasant.)