Davis and Cheeky Blakk go “full ghetto” on Davis’ goodbye to the musician’s life. Tim Feeny reveals himself and his intentions to Janette when he finds out that she’s throwing an unauthorized benefit for Gigi’s. Delmond parts ways with the powers that be. Toni sees hope that Joey Abreu’s killer may be prosecuted.

As Carnival arrives in New Orleans, Albert unveils his new plumage, and Delmond discovers a new sound; Annie heads to a rural celebration with Harley, while Davis looks for an alibi to party in town; Hidalgo combines business with pleasure on a Zulu float; Toni and Sofia struggle with their memories of Creighton; Antoine club-hops with his sons, while LaDonna avoids the fracas; and Cornell offers Sonny a second chance away from all the revelry; in New York, Chef Ripert gives Janette time off to attend to personal business and Fat Tuesday

As New Orleans gears up for its first Fat Tuesday since Katrina, Albert is sent a less-than-celebratory message by the NOPD. Sonny leaves Annie to her own devices; LaDonna puts her bad news on hold; the Bernettes make a Mardi Gras appearance, though Creighton’s heart isn’t really in it.

Davis concocts a remedy for the post-Mardi Gras blues; Annie makes a decision that Sonny takes personally; Janette’s latest chef’s gig gets bogged down; Antoine becomes LaDonna’s unexpected benefactor; Colson warns Albert to avoid trouble on St. Joseph’s night; Creighton is inspired by a classic novel set in old New Orleans.

Davis gets a "job job;" Colson gets his transfer too little too late. Batiste runs into a couple of old Mardi Gras friends; LaDonna and the boys do Mardi Gras day; Bernette and Sofia salute Creighton and carry out their Mardi Gras tradition; LP Everett experiences his second Mardi Gras in a row. Annie butts heads with Marvin Frey in the studio. Hidalgo cashes out - but pays it forward.

Jazz Fest takes center stage in New Orleans, giving Treme residents a welcome respite from a challenging year.

Antoine’s students show interest and Annie’s demo hits the mark; Sonny and Linh show interest, but no marks are hit; L.P. Everett’s new case has smoke and fire; heat at the in-laws’ house forces LaDonna to move; Hidalgo discovers a new angle; Janette’s resistance slips; Albert learns he has chronic obstructive pulmonary disease.

Aunt Mimi and Davis form a record company and sign rapper Katey Red; Janette makes her dramatic departure from Restaurant Brulard; Antoine reluctantly lands a teaching job.

Antoine does the “Cupid Shuffle,” as Desiree’s mother’s house collapses. Annie’s visiting parents learn about her record deal. Albert’s kids learn about his lymphoma. Toni learns about Sofia’s boyfriend. Sofia gets stopped by Officer Billy Wilson, prompting Toni to appeal to NOPD captain Marcus Grayson. Janette has a reunion.

Davis is upstaged by an up-and-coming rapper; Albert's attention to detail irks Delmond; Nelson makes the best of a frustrating situation; Toni questions murder witnesses; Colson moves to the homicide division; LaDonna faces a difficult choice; Annie experiences the good and bad of New Orleans; Antoine changes his tune on his teaching gig. Cowritten by George Pelecanos and David Simon.

Season 3 begins in the fall of 2007, as the neighborhood is shocked by police officers' response to a brass-band procession for a fallen musician. Meanwhile, Delmond and Albert experience different reactions to their new album; Toni finds a new ally in her ongoing crusade for justice; LaDonna is uncomfortable in her temporary lodgings; and in New York, Janette is reunited with Enrico Brulard.

Batiste receives bad news in the band room; Bernette receives a surprise but helpful package; Lambreaux receives a blessing. Davis reaches a mid-life milestone; Delmond plays a song for his Daddy; Annie gives in to her manager. Colson pays a visit to his boys on their home turf; Hidalgo does some digging on McAlary's behalf. L.P. Everett returns to New Orleans and finds he has fans in unexpected places.

Antoine does a good deed, and a homeowner suspects Nelson’s deeds may not be so good. Davis fails to sign “Sugar Boy” Crawford for his opera, but Delmond gets his father to sign up for assistance from New Orleans Musicians’ Clinic. L.P. learns that his headless skeleton wasn’t always so.

It’s Carnival time: Toni finds Judge Gatling dispensing judicial orders and potables at Galatoire’s. Janette seeks counsel from Emeril Lagasse and deconstructs crawfish etouffée with Al Roker. Sonny falls on the wagon. As Nelson schmoozes, Annie sits in with the Neville Brothers at the Washington, D.C. Mardi Gras Ball.

Desautel's on the Avenue opens softly. Sonny pawns instruments to buy jewelry. LaDonna gets threats from a stranger and support from Albert. Sofia gets evicted for her own protection. Terry finds a case collapsing and his popularity declining. Desiree confronts Robinette.

Janette’s restaurant is the talk of the town, but the popularity of a signature dish has her chefs feeling the heat in the kitchen. Meanwhile, Colson’s strained relationship with the rest of the police department comes with a personal risk; Desiree confronts Nelson about his demolition contracts; Annie begins to tire of Davis’ sulky attitude; Albert meets the jazz center’s benefactors; and LaDonna finally finds out what’s behind all the threats she’s been getting.

Antoine holidays with his kids in Baton Rouge while LaDonna and Toni look into a local case of mistaken identity. Davis and Creighton decide to take their pain to the masses, while Sonnie leaves Annie for a gig in Texas and Albert accepts an invitation for dinner.

As the city celebrates the return of many displaced residents with another second line parade, Albert presses a Councilman to reopen housing projects and Davis recruits some local musicians to put out a campaign CD.

While Janette hits the road with her cooking skills, LaDonna and Toni are given hope by a judge's sudden ultimatum and Antoine loses a mentor but gains a job.

Toni's investigation of a post-Katrina casualty gets more confusing at every turn; a routine closing at the bar for LaDonna becomes a disaster; Janette is forced to make a quick trip back to New Orleans to tend to a housing crisis; Nelson ups the ante in his business deal with Robinette; Antoine practices with his new band; Sonny turns to another musician for help when his home is vandalized.

Lt. Colson worries about the quality of the police department's investigations as citizens and activists prepare for an anti-violence march in January 2007. Meanwhile, Aunt Mimi helps Davis woo a rapper for their CD sampler; Harley encourages Annie to start writing her own songs; Nelson and Ligouri take the next step in New Orleans' redevelopment; Delmond searches for an elusive sound; Albert gets fed up with red tape; and Janette hopes her New York connections can land her a new job.

News of Jacques' troubles reaches Janette; Nelson does a favor for Oliver Thomas; Antoine names a deputy. Also: performances by John Hiatt; and Henry Butler.

Davis' band debuts, but Annie is hesitant to perform her new song. Meanwhile, Delmond runs his fusion sound by Dr. John; Nelson makes a deal with the city; Sofia falls in with the wrong crowd; and Janette mulls moving to a less intense job. Performers include Susan Cowsill and Leroy Jones.

Janette gets a new nickname; Toni relies on Colson for another favor; Sonny finds an unlikely reason to go to the docks; Antoine pays a price for his on-stage antics; Albert and Delmond travel to make their record.

Batiste helps a student in a sticky situation. Lambreaux teaches LaDonna the true meaning of "Mighty Kootie Fiyo." Hidalgo meets musician turned activist Davis McAlary. Sonny goes to "see a man about a horse," instead finds trouble. Manager Marvin Frey questions Annie's ambitions; she questions his intentions. Delmond gigs with the great Ellis Marsalis. No longer on the Avenue, Desautel is stumped about what to call her new restaurant. Colson asks to be transferred to a new district. Sofia votes yes to her mother's new living arrangement. Bernette bails out a friend. Obama is elected.