This box set brings together four episodes of the PBS science series Nova that are linked by the theme of man's best friend. First on the bill is How Smart Are Animals?, which analyzes a dog's brain as it compares to that of homo sapiens, and views it as the end product of a long period of evolution. Next up is Dogs Decoded, an analysis of the canine ability to read and respond to human emotion. Through a Dog's Eyes relays tales of disabled individuals paired with service dogs. Finally, John Lithgow narrates Dogs and More Dogs, an examination of the evolutionary process that domesticated canines and led to so many different breeds in the world today.