After more than 300 episodes together as the "Know How Bros" Padre and Cranky Hippo say goodbye to Know How 3.0 in the only way possible... by bringing back some of their favorite episodes! From testing the bacteria inside Bryan's ear, to creating home-made comets, to electrocuting the Hippo and messing with a Raspberry Pi arcade machine, this episode has a little of everything that you've loved about Know How for the past 6 years.