Professor Farnsworth installs an empathy chip in Bender after the inconsiderate robot flushes Nibbler down the toilet. With his newfound emotions, a concerned Bender ventures into the mutant-infested sewers to rescue Leela's beloved pet.

When Hermes takes a stress-relieving vacation, replacement bureaucrat Morgan Proctor becomes infatuated with Fry. Bender threatens to publicize their affair, but Morgan removes Bender's memory and hides it within the cavernous Central Bureaucracy.

Accused of robbing a bank, Fry and Bender plead insanity and are both sent to a robot insane asylum. While Bender and his buddy Roberto plan an escape, Fry is brainwashed into thinking that he is a robot.

A Planet Express mission to Robot Santa's colony on Neptune leaves the murderous robot trapped in the frozen sea, and Bender takes over as Santa, vowing to bring peace and goodwill to Xmas again. But when Bender is mistaken for the real Robot Santa, he is arrested and sentenced to death.

Amy's romance with Kif takes a twist when he gets pregnant. As she questions her commitment to Kif, he must return to his ancient, mysterious home world to give birth in the same muddy swamp where he was born.

Professor Farnsworth forbids the crew to look inside a mysterious box. Leela can't resist taking a peek, discovering the box to be a gateway to a parallel universe.