Callie and Izzy notice a sudden surge in Puppetitis B sufferers, and Callie thinks she knows who's responsible. Meanwhile, we learn how Puppetitis B is transmitted, thanks to a helpful video from the '50s.

Callie and Izzy notice a sudden surge in Puppetitis B sufferers, and Callie thinks she knows who's responsible. Meanwhile, we learn how Puppetitis B is transmitted, thanks to a helpful video from the '50s.