At Dartmouth College, researchers are trying to understand how habits work in the brain. Kelly Prime investigates the work that researchers are doing to try and modify habits in rats, to find ways to help humans deal with their habits.

Studying the behavior of lumberjacks, Dr. Marie Saint-Hilaire filmed loggers to understand a neurological disorder known as the Jumping Frenchmen of Maine. Emma Weatherill investigates how neuroscientists have studied this disorder, and how bullying may be the cause of the condition.

With two sons who suffered from Huntington's Disease, Raima Fernald did everything she could to support them. Peter Frick-Wright documents how Fernald cared for her sons before they passed away.