Tobias searches for meaning after splitting with Lindsay, only to find that old habits die hard.
Michael is presented with a new business opportunity that could change his life, but unfortunately, he needs his family to sign off.
Lindsay tries to reclaim her sense of self while traveling and getting back to her political activist roots.
George Sr. comes up with a get rich quick scam after his family falls apart.
Michael says goodbye to the family business and starts his own. And the life of the family is turned upside down when their mail man Pete dies.
After returning home from Iraq, George Sr. is finally cleared of all charges, and Michael is relieved to be the head of a successful company for a change. The real brains behind the madness is revealed, and just as the family begins to celebrate their victory, a whole new set of problems emerge.
Gob goes to Iraq to perform his Christian magic act on the USO tour and ends up incarcerated. Michael learns George, Sr. sent Gob to Iraq to burn down the model home he built there, so Michael and Buster fly to Iraq to spring their brother from prison.
In an effort to get to the bottom of things, Michael tracks Nellie down and hires her as a consultant for the Bluth Co. Unfortunately, Michael discovers Nellie’s hands-on approach is more than he bargained for.
George, Sr. hires a new attorney who asks the Bluths to participate in a mock trial to help prepare them for the real thing. The attorney gets actor Judge Reinhold to preside over the mock case. Meanwhile, Buster fakes a coma to get out of testifying, and George Michael and Maeby participate in a mock wedding to entertain hospital patients. Back at the office, Michael discovers that he may have a long-lost sister named Nellie Bluth.
George Sr. suggests a last-ditch effort to save the family by holding a fund raiser to raise money to pay their legal expenses. Michael suggests to Lindsay that she take over the house work, and he sends George-Michael to an expensive boarding school. Meanwhile, Maeby has trouble with a snowboarding film and Tobias tries to be a “discipline daddy”.
Michael is tired of his father always having Gob compete with him, so Michael gets Gob his own banana stand franchise, only to find that Gob has set it up 20 feet from the old one. After the two compete, they decide to teach their father an elaborate lesson, and Buster refuses to use his handicap to scare kids. Meanwhile, Maeby uses Lucille’s surgery in a horror film.
The family plans their annual fund raiser, and they actually have a cause this time. Tobias is ailing due to his transplanted hair plugs, which appear to be rejecting him. Lindsay uses the illness as her ticket back into high society, and Michael learns of the prison warden’s true intentions with his mother after reading the warden’s screenplay.
After Michael announces he’s marrying Rita, George Sr. worries that she’s after the family’s money. But when Rita’s Uncle Trevor tries to stop the wedding by revealing some surprising information about Rita, Michael must decide if he wants to walk down the aisle.
Michael must deal with a huge mole problem in order to salvage a major real estate deal with Japanese investors. In an effort to help Michael, Gob and Buster team up with George Sr.’s surrogate, Larry, to devise a plan and save the deal, but their plan falls apart in a big way. Meanwhile, Tobias mistakes a CIA agent for a CAA agent and inadvertently betrays the family, and Michael makes Rita a proposal she can’t refuse. Frankie Muniz makes a cameo as himself.
To prove he’s a man to Rita, Michael and his nephew Steve Holt compete in the Church And State Fair’s annual triathlon. George Sr. tries to scare some at-risk youth, and Tobias tries to help George-Michael’s girlfriend Ann to compete in the fairs’ “inner beauty” pageant.
George Sr. is placed under house arrest by the family’s new attorney Bob Loblaw, and finds that it’s not exactly a walk in the park. Michael sets up his first date with Rita, but Rita has an unfortunate encounter with the family beforehand.
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 Gob goes to extremes to avoid his newly discovered son.
Michael learns that it’s actually George Sr.’s twin brother Oscar serving time in prison, not George. After getting a tip from Barry, Michael heads to Reno to find George, but that costs him a camping trip he promised his son.
Gob hides George Sr. while the model home’s plumbing is checked; George Michael helps Ann protest Maeby’s new movie; Tobias takes a liking to Kitty after Michael asks him to keep an eye on her.
Gob confronts the editor of the videos that showcased his magic mistakes. Michael tricks Lucille in to rehab, and then attempts to get her out after George Sr. is kidnapped.
George Sr. tries to find a way to attend an anniversary dinner for Lucille while Michael deliberately offends Ann’s devout Christian parents. Tobias goes overboard performing his “Mrs. Featherbottom” persona.
Gob and Buster team up for some magic tricks with the help of Buster’s fake hand, but when Tony Wonder, a rival magician, starts to mentor them, somebody gets the finger. Meanwhile, Michael is forced to delegate some work when he’s hospitalized and Lindsay teaches George Michael how to drive using the staircar.
George Michael runs for student body president, which Gob manages to ruin. Buster has an affair with Lupe, who is being sought after by Lindsay and Tobias attempts to move out of the model home, then develops a new persona when he regrets his decision.
Lucille abducts George Michael for a mother-son dance, Buster adjusts to having a hook for a hand and Gob reunites with his estranged wife. Also, Tobias stars as George Sr. in a biopic about the Bluth family, which causes Lindsay to become more attracted to him.
Michael tries to find out who’s the father of Maggie’s baby, or if it’s just another of her lies; Gob tries to find out whether he was responsible for Buster’s accident.
Just as Michael’s relationship with Sally starts to flourish, Maggie Lizer returns nine months pregnant, and Michael immediately assumes he’s the father. George Michael attempts to break up with Ann, and Buster learns he’s being deployed to Iraq.
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.
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.
Michael sells a portion of his stock in the Bluth company to buy a car, and Lucille 2 returns, only to discover that Buster is dating the company secretary Starla.
The Bluths rival development company hires Gob, who finds the company president a father figure, in preparation for the Bluth-Sitwell softball game; Lindsay hallucinates from taking anti-depressants.
Gob stages mass firings after being inadvertently roasted at the Bluth Company Christmas party. Michael is forced to rebuild the Banana Stand, and Buster plays hooky from the Army at an arcade game.
George Sr. fears he’s losing Lucille to Oscar. Gob motivates Buster for the Army while Lindsay spends more time with Maeby to get closer to Steve Holt and Tobias starts working out.