The show is about the everyday lives of CIA agent Stan Smith and his family, a housewife named Francine, a hippie daughter named Hayley and a younger son named Steve, as well as a German Olympic ski jumper named Klaus who spends the rest of his life in the body of the family's pet fish and a roommate alien named Roger.
Deacon Stan, Jesus Man (S01E07)
Roger gets hooked up to a mechanical feeding system so he can produce more milk for Stan's mind-controlling potato salad.
Camp Refoogee (S03E01)
Hayley gains "The African 20" after staying at the refugee camp for the summer.
The American Dad After School Special (S03E02)
After shaming on Steve's new girlfriend for her weight, Stan realizes he himself has weight problems and tries to work out so that he can look the way he does when wearing clothes. He sees himself putting on more weight than before when he's worked out so much that he has become anorexic. Taking advice from a girl in an anorexia support group, he fakes eating any specific food and instead feeds it to Klaus.
Oedipal Panties (S04E11)
Roger dons a sassy black woman disguise, who's characterized as being sort of fat. To fit into character, Roger's body inexplicably gets fatter, when the disguise gets put on.
Don't Look a Smith Horse in the Mouth (S05E10)
Al Tuttle gains a gigantic amount of weight and becomes a shut-in.
A Jones for Smith (S05E11)
Fat Al Tuttle appears again, this time, shut in his garage.
Merlot Down Dirty Shame (S06E15)
In the opening credits, Roger's disguise gag is the sassy black woman from "Oedipal Panties".
Spelling Bee My Baby (S08E14)
Stan and Roger guilt trip Hayley into feeling depression over the loss of Jeff. Roger puts on a Israel Kamakawiwo'ole costume and sings "Over the Rainbow/What a Wonderful World", while a slideshow of all of Hayley and Jeff's memories plays, finally getting her to cry.
Roger disguises himself as a rather wide framed woman named Ruby Zeldastein.
Buck, Wild (S10E03)
Roger and Klaus become overweight during their road trip.
Stan indulges in Greg's cakes after opening his own bakery.
Roger goes in disguise as a heavyset man named Dom Fikowski.
Hayley Smith, Seal Team Six (S13E03)
In the opening credits, Roger's disguise is the road trip outfit from Buck Wild. Referencing to that episode's events, Roger is again, portrayed as fat.
Father's Daze (S14E01)
In the opening credits, Roger's disguise is Dom Fikowski from "Roots".
Daesong Heavy Industries II: Return to Innocence (S13E16)
In the opening credits, Roger's disguise is Ruby Zeldastein from "Poltergasm".
Twitter Post September 26, 2014
Roger has an instagram account for each of his disguises. One of them shown in Ruby Zeldastein, erroneously labeled as "Zelda".
Twitter Post November 20, 2014
Roger is in the sassy black woman disguise from "Oedipal Panties", smoking with Mah Mah Ling and Betty Smith.
Twitter Post January 7, 2015
In a collection of Roger's disguises, one of which was the sassy black woman from "Oedipal Panties".
Twitter Post May 1, 2015
In a parody of The Avengers, Klaus is hulked out, making him more fat than muscular.
Twitter Post April 25, 2016
Roger is shown without makeup, wherein he appears as a Gollum-like creature. One of his features is appearing as kind of fat and flabby.
Twitter Post July 4, 2016
Roger is dressed as Kendra Krinklesac from The Cleveland Show, making him put on a few pounds.
Twitter Post Nov 24, 2016
The Smith Family becomes extremely fat from eating Thanksgiving dinner.
Twitter Post March 1, 2017
Roger eats tons of food and becomes extremely fat, in honor of Fat Tuesday.
Twitter Post September 10, 2017
Multiples Rogers dress up in his female alter-egos for a Miss America beauty pageant. One of the costumes used was the one for Ruby Zeldastein.
Twitter Post March 17, 2018
In a St. Patrick's Day image, Hayley is depicted as very slightly fatter than usual, from drinking a lot of beer.