Barney finds out that Ted and Robin split up two weeks before Marshall and Lily's wedding, but kept it secret so they wouldn't overshadow the event.
When Rainbow's sister, reality TV star Santamonica, visits town, Rainbow wonders if they have anything in common. Zoey has a suggestion for Dre.
When Jack and Diane bring home the results of their career tests, Rainbow and Dre get a shock. Ruby becomes convinced that Diane's possessed.
The family is divided over the idea of getting a dog. Meanwhile, Bow's brother Johan is in town and he doesn't get the warm welcome he expects from Ruby.
Advertising executive Dre happily anticipates a promotion, while Andre Jr wants to covert to Judaism and have a bar mitzvah like his friends.
