In this episode, the Project X team explores and experiments with light. A look at light's basic properties, the light spectrum, colour perception and photosynthesis leads to an examination of the most cutting-edge light science on the planet. Dr. Gardy follows a Harvard genius works on slowing light down. Dr. Fleck and grad student Marc Huot discover the role invisible light plays in crime scenes and forensics. And Dr. Alters takes a look at how the study of jellyfish may help us understand the evolution of the human eye!