With the help of Chevy Chase and Dan Aykroyd, Stewie and Brian discover that Mayor West is a Cold War sleeper agent; Peter and the guys start an improv group.
Brian becomes the laughing stock of the family when he begins dating an older woman, but things get worse when she breaks her hip and he has to be her errand-boy.
Brian helps Stewie meet Miley Cyrus, only to discover a secret about her identity; The family discovers that the evil monkey in Chris's closet isn't actually evil.
The guys find a new black friend to join their group, until Peter finds out that he slept with Lois. Meanwhile, Brian tries to find out why Quagmire hates him and tries to make amends.
After accidentally killing another dog and surprised that no one cares, Brian tries to convince everyone that dogs should have the same value as humans.