If you could travel back in time what would you find 50 million years ago? What was the climate like? Would you find the same plants? What animals were crawling, walking, and flying around? Paleoentomologist Bruce Archibald takes Dr. Biology back in time to explore the planet during the Eocene Epoch where things were a bit different than today – there was even a giant flying ant that would make anyone look twice.

Remember your last paper cut, or the bad cold that had you coughing and blowing your nose? It was your immune system that was busy trying to make you better by battling the bacteria or virus that was attacking your body. How your immune system works is the discussion Dr. Biology has with pediatrician Paul Turke. They also talk about how our immune systems have to reboot to keep up with evolving bacteria and viruses.

According to an old German proverb the animal that is the subject of this show was made by the devil. Dr. Biology gets a lesson about this devilish study subject from biologist Raghavendra Gadagkar. They talk about what he has learned from years of observing these misunderstood animals. There is even a surprise ending that we call the 'Queen Switcharoo'.

If you are a tobacco plant, you have a bad reputation. The link to cancer and other health related diseases is cause for any person to avoid you. But there is another side to this plant. Dr. Biology sits down with biologist Charlie Arntzen to talk about how tobacco plants are helping scientists produce treatments for viruses like Ebola.