After an encounter with a mysterious four-dimensional space whale, Leela finds herself becoming obsessed with hunting down and harpooning the elusive creature.
Kahn nearly runs his new carwash business into the ground, so Mr. Strickland enters into a partnership with him and orders Hank to help out his neighbor.
Homer comes to the conclusion that he's not a very good father to Bart and decides to become more involved in his life by building a soapbox racer with him.
Lisa's joy turns to sorrow when she realizes that Homer has only been spending Sunday afternoons with her because of her accurate football predictions.
Gene and Courtney are given the opportunity to be the new hosts of morning announcements, but their romantic history poses challenges; Tina's plan goes awry.
Tina volunteers to work with Nurse Liz, and ends up being a part of a lice-infestation; Bob tries to improve the restaurant but ends up driving customers away.
The Belcher kids hop into action after news of a bounce house crisis at a birthday party; Bob encounters a guest at the restaurant, forcing him to face a fear.
After learning of a nearby mystical creature, Gene takes the Belcher kids on a quest to find it; during a slow day at the restaurant, Linda becomes competitive.
Peter soon befriends a popular, attractive paramedic and decides to stop being friends with Quagmire, Joe and Cleveland to spend more time with his new friend.
Peter and Louis find themselves with a golden opportunity to reconnect as a couple after Lois' parents get a nanny to take care of the children for them.
Chris receives a special one-dollar bill as a birthday present, but he quickly loses it and the dollar passes into the possession of everybody in Quahog.
The Griffins kick Brian out of the house after he posts an offensive tweet that becomes viral, which makes other people treat the Griffins like outcasts.
In a reimagining the classic story "A Christmas Tale," Peter is visited by the ghosts of Christmas past, present and future when he loses his Christmas spirit.
Brian becomes attracted to a female show dog he met at the vet's office; Peter and Lois desperately try to convince Chris that "Arthur Valentine" is fictional.
Stewie and Brian's long-time friendship comes to an abrupt end; Peter shakes hands with his favorite breakfast cereal mascot and won't wash his hand afterwards.
Fry and the rest of the Planet Express crew are shocked to uncover a dark secret revolving around the day that Professor Farnsworth and Dr. Zoidberg first met.
The crew encounters an alien who lacks an understanding of the concept of gender and switches the sexual characteristics of all aboard the Planet Express ship.