G.O.B. decides to lock himself in his father's prison for 24 hours to get back in with the alliance, and to spend quality time with his father. Michael takes G.O.B.'s girlfriend to an awards show, and Buster inadvertently flirts with his mother's rival.
Michael sets up an "intimate conjugal visit" for his parents, while it is revealed that George Sr. had an affair with Kitty, his secretary who recently slept with G.O.B.. Tobias and Lindsay see a marriage counselor.
Michael attempts to fire the family's incompetent but likable attorney. George Michael impresses Maeby with a muscle suit for a "Living Classics" pageant. Tobias has a psychological affliction where he is unable to take off his clothes.
Michael loses his short-term memory, which Lucille uses to her advantage. G.O.B. attempts to use the family yacht before Michael sells it. George Michael and Maeby attempt to see an R-rated movie about cousins having an affair. Buster and Lucille 2 take "the next step".
Michael cannot go through with his plan to break up G.O.B. and Marta. A thug magician wants to take G.O.B.'s "legs". Maeby wears all leather to get back at her mother, and Lucille decides to confront Buster's relationship with Lucille 2.
When George Michael is rejected by a private school due to the family's reputation, Michael hires a publicist from his gym who he's been flirting with to change the public perspective of the Bluths. Meanwhile, Tobias is sent to Boston to reclaim his medical license.
When Lucille throws an anniversary party for Tobias and Lindsay on Valentine's Day, Michael gives an impassioned speech about love. This makes Marta realize she has feelings for him and Lindsay realize she wants a divorce. Buster decides to move out of the penthouse.
After learning that Marta has feelings for him, Michael goes to her and they decide to get permission from G.O.B. before taking things to the next level. Meanwhile, Lindsay and Tobias finally get to the heart of his "never-nude" problem and George Sr. faces his first hearing.
When Michael discovers his family has been receiving paychecks without working, he forces them all to get jobs within the company. Lindsay questions his management skills, and Tobias checks himself in at George Sr.'s prison to research a film role.
Michael attempts to have a one-night stand with an attorney whom he doesn't know is blind. G.O.B. gets married on a dare, Maeby pretends to be a girl with a made up disease, and George Sr.'s admirer turns out to be an undercover SEC agent who has truly fallen for him.
G.O.B. attempts to make good on his promise to make the family yacht disappear. Lindsay and Maeby try to track down Lindsay's grandmother, Tobias seeks George Sr.'s respect, and Michael attempts to fire Kitty, who claims to have information that could bring down the company.
George Sr. uses G.O.B.'s bachelor party as an opportunity to set up his accountant in a compromising position so that he can blackmail him. Meanwhile, Michael tries to prove he's a fun guy, and the Fünke's reunite their family folk-music band.
Michael deals with numerous requests for some unfrozen money, and chastises Lucille for being too coddling with Buster. Also, Lindsay decides to protest the war to boost her self esteem, Tobias and G.O.B. decide to start a coffee company.
After George Sr. escapes from prison to Mexico, Michael swears to leave the family forever. However, he decides to stay and the family gets even more out of control. Buster joins the army and loses a hand. Tobias goes to work for the Blue Man Group. Michael continues to keep his sanity, and his family together at the same time.
George Sr. is at large, making Michael next in line to be prosecuted for the Bluth Company crimes. Meanwhile, Michael is vexed to find that the family is fine without him, and police mistake Oscar for George Sr. and arrest him.
Michael is driven crazy by G.O.B. when he impresses the board as the new company figurehead due to Michael's legal troubles. Meanwhile, George Sr. is arrested in Mexico for a crime Oscar committed, and Buster witnesses something that utterly shocks him.
Michael is increasingly frustrated over being abandoned by the family, and when the staircar is found in Mexico, Michael vows to find his father and give him a piece of his mind. Also, Buster spends time with Lupe's family and thinks he's in Mexico.
Lucille hires Ice, the bounty hunter to find George Sr., who may be closer than everyone thinks. G.O.B. tries to pull off an elaborate illusion, Maeby tries to set Lindsay up with Ice, and Michael tries to mend George Michael's broken relationship.
G.O.B. stages mass firings after being inadvertently roasted at the Bluth Company Christmas party. Plus, Michael is forced to rebuild the Banana Stand, and Buster plays hooky from the Army at an arcade game.
The Bluth's rival development company hires G.O.B., who finds the company president a father figure, in preparation for the Bluth-Sitwell softball game; Lindsay hallucinates from taking anti-depressants.
Michael reunites with his long, lost love Sally Sitwell, but faces interference from parents; meanwhile, the two Lucilles need someone to bid on them at the bachelorette auction with Buster already in a relationship.
With the company in dire financial straits and the Bluths no longer the primary shareholders, Michael must turn to old family friend "Uncle" Jack Dorso for financial assistance. Uncle Jack, however, wants something in return.
Just as Michael's relationship with Sally Sitwell starts to flourish, Maggie Lizer returns nine months pregnant, and Michael immediately assumes he's the father; also, George Michael attempts to break up with Ann, and Buster learns he's being deployed to Iraq.
Lucille abducts George Michael for a mother-son dance; Buster adjusts to having a hook for a hand; G.O.B. reunites with his estranged wife; Tobias stars as George Sr. in a biopic about the Bluth family, which causes Lindsay to become more attracted to him.
George Michael runs for student body president, which G.O.B. manages to ruin; Buster has an affair with Lupe, who is being sought after by Lindsay; Tobias attempts to move out of the model home, then develops a new persona when he regrets his decision.
G.O.B. and Buster team up for some magic illusions to impress Tony Wonder, a rival magician. Meanwhile, Michael is forced to delegate some work when he's hospitalized and Lindsay teaches George Michael how to drive using the staircar.
George Sr. tries to find a way to attend an anniversary dinner for Lucille; Michael deliberatly offends Ann's devout Christian parents; Tobias goes overboard performing his "Mrs. Featherbottom" persona.
Michael postpones camping with his son to look for his father in Reno. Meanwhile, Lucille goes off her medication; G.O.B. meets a fellow disappointed son; and Maeby and George Michael can't help being thrown together.
Investigating his father's claim that a British group set him up, Michael goes to "Wee Britain" and is smitten with a beautiful woman named Rita. Lindsay attempts to seduce the new family attorney, and G.O.B. goes to extremes to avoid his newly discovered son.
Michael tries to hide Rita from his family with disastrous results; Lindsay waits hand and foot on the Bluths' new lawyer; George Sr. attempts escaping via balloons; Tobias tries to help Buster gain some self-confidence; George Michael confronts Steve Holt about Maeby.
Michael enters a father-son triathlon with Steve Holt; Maeby dons a disguise to compete in an inner-beauty pageant while her parents coach other entrants; George Sr. speaks to at-risk youths, and Buster tries to recruit one to replace him in the Army.
Michael is worried when he learns that Lucille is dating the warden behind his father's back; Buster's new turtle gets into "Uncle-Father" Oscar's stash; the family plans a benefit for Tobias' life-endangering hair transplant.
The season has a slightly different format from the previous three, consisting of 15 episodes with each episode predominantly focusing on one member of the Bluth family and what they have been doing since 2006. The first episode revolves around Michael who is the only character who appears in all 15 episodes.