A lunar misstep sends Roger on an unexpected detour to New Mexico.
Hayley tries to help Roger write a book.
Steve and Principal Lewis get caught in a dangerous situation at the school. The rest of the family makes an adorable new friend.
Klaus and Jeff's friendship is threatened by Klaus's girlfriend from another realm.
When Jeff finds out that the family thinks he makes terrible decisions, he decides to take a job selling stretchy leggings to prove them wrong.
When Stan discovers anonymous love letters written to Francine, he worries that this secret admirer could threaten their relationship.
The judgmental voice in Hayley's head makes it impossible for her to enjoy a girls' night with Nerfer and Danuta.
Francine insists that Steve let her help with his school project, Stan finally fixes that shingle, and the rest of the family goes on a quest to return Gallagher's mallet.
In an attempt to maintain his "prime," Stan explores some cosmetic solutions that could not go worse.
When Stan goes too far to keep his work friend away from Francine, she is forced to save her new "little" friend.
Hayley makes Jeff get a friend to add some mystery to their relationship but gets more mystery than she bargained for. Francine attempts to grow the world's longest fingernails.
The Smiths get new neighbors! Meanwhile, Roger dreads having to be a little boy's kite for a day.
Francine becomes an overnight sensation when a famous art dealer discovers her homemade pottery.
Hayley searches for a runaway Steve so they can go to a Shaggy concert.
It's Halloween night and Stan is missing, so the Smith gang heads to the spooky, abandoned CIA headquarters to investigate.
Klaus house sits for the Smiths while they are away on vacation. Roger investigates the origin of powerful winds plaguing the Eastern Seaboard.
Social Services threatens to take Steve away from the family when someone files a complaint about Steve's chaotic home life.
Stan and Roger go on a mission to leave their mark on humanity. Jeff finally deals with the reality of losing his signature hat.
To have a chance with a girl, Steve and Snot must track down a keg of 4Loko.
Francine enters the strange and dangerous world of poker in order to learn how to hide her true feelings from Steve and Hayley.
Suspicious about Hayley's mysterious, newfound wealth, Francine decides to get to the bottom of it. Roger sets out to make Stan an internet celebrity.
When Steve gives the family better Christmas gifts than Stan, Stan goes to great lengths to regain his title of "King of Presents."
Watch American Dad! Season 20, Episode 16: A New Era for the Smith House online on FlixGems. Klaus house sits for the Smiths while they are away on vacation. Roger investigates the origin of powerful winds plaguing the Eastern Seaboard.