Stewie and Brian use a remote control to travel through a series of various parallel universes. They eventually end up in a world where dogs rule and humans obey. Brian becomes reluctant to return to his own universe, and he ultimately ends up breaking the remote. Stewie asked Bryan why he broke the remote, now they will never get back home. Bryan explains that it was an accident and that he finds this whole dog-run universe fascinating and wants to stay longer. Things take a funny turn when Stewie starts playfully teasing Bryan, demanding that he pick up his poop.
But guess what? Watch till the end.