AMERICAN DAD, the animated series that follows die-hard Republican and card-carrying NRA member Stan Smith and his hilariously odd family in Langley Falls, VA, is back to salute a fourth season of laughs. The comedy continues this season when Stan becomes an exotic dancer, Roger decides to have his home planet blow up Earth and Steve and his friends plan a heist at a classmate's bar mitzvah.
The Smith family gets ready to celebrate Roger's big 1-6-double-0 but are sidetracked by Steve's horrifying announcement that he's going through puberty! With the wounds still fresh from Hayley going through "the change" in their minds, Stan and Francine use experimental medicine to try and bypass the growing pains of having another teenager with raging hormones. Meanwhile, Roger gets the shaft from the family and tries to make his own birthday fun.
When Roger discovers that someone has maxed out his credit card, he is certain it is identify theft and is determined to bring down the crook. After playing Matlock for a few days and dishing out some street justice, he realizes things are not quite right and seem all too familiar. Meanwhile, the rest of the Smith family gets sucked into a mean game of Simon.
When Stan becomes Bullock's No. 1 guy, he feels like he can't say no to anything including his outrageous personal requests. But when Francine gets roped into the annoying ordeal and her romantic Valentine's Day get away is ruined by Bullock's problems, she lays down the law and forces Stan to say "NO!"
Stan becomes jealous when he finds out Francine was once engaged to a pilot whose plane crashed. Little does she know that her lost love is still alive, but Stan and Roger track him down. Francine is forced to decide between the two men.
Steve plots to get revenge against the popular girls at school who torment losers.like his girlfriend Debbie (voiced by Lizzy Caplan).
Hayley breaks up with her boyfriend and ends up in the arms of Stan's body double from the CIA, but things get really bizarre when the body double starts hitting on Francine.
When the CIA's budget gets cut, Roger suggests that Stan hold a telethon to raise funds. When Stan takes credit for the brilliant idea, Roger does everything in his power to sabotage it.
When Steve finds out he has scoliosis and has to wear a back brace, he becomes the laughingstock of the school, but feels better when Stan admits to wearing a toupee since he was Steve's age. Meanwhile, Roger takes Francine to a weeklong spa retreat for two, but they run into problems when they try to sneak in an unpaid guest.
Stan is exhausted every night and doesn't have any time for himself. When his co-worker Dick (voiced by David Koechner) gives him pills that allow him to stay up all night, but feel like he slept a full eight hours - Stan is ecstatic! The pills give Stan an extra dose of energy, but he ultimately discovers that instead of spending his newfound time on hobbies, he'd rather spend more time with his wife.
When the Smiths try to plan a family game night, Roger is full of excuses about prior commitments. However, when he is caught in a lie, the Smiths feel stabbed in the back when they realize Roger has been cheating on them with other families. Stan, Francine, Hayley and Steve go on the offensive to teach Roger a lesson about monogamy until Roger has a breakthrough about why he isn't a one family kind-of-guy.
When Langley Falls implements a ban on trans fats, Stan finds himself legally separated from his favorite foods. He sets a poor example for the rest of the family when he blatantly disregards the law by crossing county lines and using Steve as a trans-fatty food mule to satisfy his own gluttonous desires.
When Stan forgets to pick up grenadine at the grocery store, Roger goes ballistic and vows to get him back by taking over a project close to Stan's heart - the Homeowner's Association. When Roy Rogers McFreely is appointed chairman of the association and starts to abuse his power, Stan, Hayley and Steve lead the opposition to preserve the small town's "American" values and take the community back from "the man".
Steve signs Stan up for a father-son bike tournament, but the plan veers off-track when Stan admits that his father never taught him how to ride a bike. Determined to make things better, Steve helps reconcile Stan with his convict father. Meanwhile, Hayley needs internship credit for school, so Roger hires her to bartend at his makeshift bar in the attic.
Steve and the gang sabotage a stuck-up kid's bar mitzvah after he hits on Steve's girlfriend, Debbie. But when Snot gets wrongly accused of stealing the kid's bar mitzvah money, he must answer to the Rabbi and his own celebration is in jeopardy. Meanwhile, Stan and Francine pitch a cell phone idea to Verizon, but the plan gets fuzzy when they can't deliver the goods.
When Stan gets kidnapped in Colombia, Francine fears he's gone for good. Stan finally reappears unharmed, but the real trouble erupts in the Smith household when he admits that he has a plan to marry his dentist if Francine dies before him. Meanwhile, Steve and Roger play detective duo "Wheels and the Legman."
Stan is excited about finally building his dream car: a DeLorean. Francine encourages him to include Steve, so the two take a road trip in search of doors for the sports car. The trip veers off-track when there is a mad dash across the country to get the last set of doors available.
Steve joins a junior football team to make Stan proud. However, when a hyper-competitive Stan assumes the position of head coach, Steve gets kicked off the team for not being good enough. Out for revenge, Steve and Roger recruit a new team of misfits who threaten Stan's perfect season. Meanwhile, Francine and Hayley compete for a blue ribbon at the Langley County Fair.
Roger has been behaving like a selfish brat for years, and Stan has had enough! When he calls Roger out, he declares that he has in fact been sent to earth as "the decider" to determine the fate of man kind. Stupefied by his outlandish statement, Stan challenges Roger to prove it and when they discover the truth about his real purpose for being on Earth, Roger is crushed and Stan is tickled pink to have finally won one. Roger struggles to get a grip on reality until a fateful crate of hotdogs takes center stage at Steve's hot-dog eating contest and Roger gets to decide who lives and who dies.
Neighbors Terry and Greg are nervous when Terry's father, football great Tank Bates, announces that he will be coming to town for a visit. Terry is worried because his dad doesn't know he's gay, has a baby or lives with his partner. Meanwhile, Steve goes on a drunken bender and learns the meaning of "beer goggles".
Stan leaves Francine at home to go out with the boys, but guys' night out goes from wild to reckless when Stan finds himself in one compromising situation after another. Meanwhile, Roger and Hayley use their charm and looks to attract a frat boy.