When Stan refuses to switch Klaus back into his original body, he steals Stan's body; Roger builds a gym in the attic.
Jeff must prove his love for Hayley to Emperor Zing in order to find his way home from the spaceship that abducted him.
Stan is shocked when he is told that Deputy Director Bullock is showing early signs of dementia and needs his memory erased; Roger hires an old friend to help Steve with a bully at school.
When Stan gets amnesia, Francine tries to turn him into her ideal husband; Steve is drawn into the corrupt side of Roger's paper route business.
Francine tries to get Stan to spice up their sex life; Hayley tries to get back into dating and accepts a date with Snot.
Francine tries to rig the school spelling bee so that Steve will win; Stan and Roger try to rush Hayley's grieving process so she will be available to judge their badminton game.
When Black Villain shoots Stan's new wife, Sexpun Tocome, on their honeymoon, Stan teams up with his nemesis to take him down.
Roger pretends to be Jeff's imaginary friend so he can roam around the house without a disguise; when Jeff realizes Roger is an alien, Stan issues an ultimatum -- either Roger or Jeff must be killed; Steve becomes insecure about his body.
Roger announces that Max Jets, a character who showers the Smith family with money, is making a return; a gold-digging waitress romances Max and threatens the family's inheritance.
When Francine invites Stan's father to a party, a dark secret about the Smith family's past is revealed.
Francine regrets deciding to teach Roger the value of hard work; Steve interviews Stan for a school project.
The Smiths get drunk at Roger's Mardi Gras party and make a pact with Bullock; Roger tries to find the person who left a pastie in the attic.
A talk show reveals that Francine was the toddler who, famously, was rescued from a well by a firefighter; Francine makes a discovery when she falls down the well on the anniversary of her rescue; Stan and Roger come up with a business idea.
When Steve's baby sitter is unavailable, Stan and Francine decide to leave him with Hayley; Steve sneaks out to a party to prove he's not a goody-goody.
When Stan decides that Snot isn't cool enough to be Steve's best friend, he tries to separate them by staging a shooting at an ice cream parlor.
When Stan invites his recently widowed mother to move in, she and Roger fall in love and wed; Steve and his friends find a lost movie script.
Francine thinks Stan spends too much time with his friends; a boy band recruits Steve and his friends for a music video.
During the Smith family's tropical vacation, Stan is ordered to kill the activities director at their resort; Jeff and Hayley try to rekindle their romance.
When Roger hires Hayley as a singer in his new bar, he becomes enthralled by her voice; Stan tries to prove his masculinity by negotiating a good deal on a new car.