American Dad Season 5 Episode 9 - Rapture's D...
The Rapture happens on Christmas Eve, and Stan is left behind.
American Dad Season 4 Episode 13 - Jack's Bac...
Steve connects with his ne'er-do-well paternal grandfather, whom Stan despises for many reasons, not the least of which is that he never taught him to ride a bike. (Others include his dad's criminal proclivities and, oh yes, aband...

American Dad Season 4 Episode 12 - Roy Rogers McFr...
Roger is mad at Stan, so he wrests control of the Langley Falls Homeowners Association from him, then abuses his power and changes the town's "American" character.
American Dad Season 4 Episode 11 - Live and Let Fr...
When Langley Falls bans trans fats, Stan and Steve become smugglers. Meanwhile, Klaus gets word that he has received an inheritance but can't collect it because the CIA has turned him into a fish. So he has Roger impersonate him in his...