In this episode, Sheldon tries to help a classmate who has a tapeworm, while also dealing with his own struggles in understanding the concept of David and Goliath. Meanwhile, Missy tries to get attention from her parents by pretending to be a vegan.
Meanwhile, Sheldon's classmate, David, reveals that he has a tapeworm. Sheldon becomes obsessed with helping David get rid of the parasite and sees it as an opportunity to apply scientific principles to a real-life problem. He enlists the help of his mother, Mary, and they come up with a plan to help David get rid of the tapeworm. young sheldon s01e19 dts