Why do we read so much into how a robot moves, and what does that tell us about human brains? Why did our history make us so sensitive to movement? Why do we trust graceful motion? Should we make a robot 'look' at an object it’s about to pick up, even if it doesn’t need to? Is movement the original form of animal intelligence? Join Eagleman with guest Catie Cuan, a roboticist, dancer, and choreographer. Catie’s an expert on the strange social interface between humans and machines, and she’s gotten there by dancing with robots.

Why do brains generate strange thoughts sometimes? And why do some brains refuse to let go of those thoughts? Today we'll talk about Obsessive Compulsive Disorder (OCD) with expert Jon Hershfield, getting a view from the inside and the outside. Why do some people lock the door but go back repeatedly to check it, and still have a feeling of uncertainty that it’s locked? Why do some people wash their hands over and over and never feel that they reach a point when it’s “done”. How, for some people, are intrusive thoughts like junkmail that the brain just cant help opening? We’ll see how obsessive thoughts can get caught in loops, and how those loops might therapeutically be broken.

What if your brain got stuck in sadness and never reset? What does it feel like when joy disappears completely? Can a person love their family deeply and still want to die? What do you do when treatment after treatment fails? What if the difference between despair and recovery is electrical? How can we better recognize invisible struggles in those around us? Join Eagleman with guest Jon Nelson, a man who suffered for years under the grip of depression, and finally found a science-fiction like treatment which gave him relief.