Chidi begins formally teaching Eleanor about ethics, and lesson No. 1 is: be kind to your neighbor. Michael and Janet help Chidi find a new, exciting hobby.

Tahani throws a dinner party to impress. Eleanor and Jason both have to lend a hand when things don't go as planned.

A surprising announcement from one of the humans threatens to dissolve the group.

Eleanor makes a startling discovery that tests her resolve, Tahani looks to make amends and Janet does some bonding.

Michael and Jason sneak into Demon-Con. Left in charge of the neighborhood, Eleanor copes with Derek's ineptitude and Tahani's dissatisfaction.

With one day left in the year, Simone reveals that she's suspicious about the neighborhood -- and her investigation could derail the entire experiment.