How many times have you heard someone say their family dog was able to sense disease long before their owner was found to have it?

Stories like that have been mounting, to the point where science isn't dismissing them anymore. W5's Sandie Rinaldo investigates how a dog's superior sense of smell could soon be a legitimate, and much less invasive, diagnostic tool.

Watch the episode in our video player above, available after 8 p.m. ET on Saturday, Nov. 19.