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Vicki considers buying a yacht.

Tamra's husband quit his job.

Tamra and Simon Barney celebrate their ten-year wedding anniversary with a weekend getaway in Napa, and they invite Vicki and Donn to join them. While Tamra and Simon enjoy a romantic weekend of wine tasting, grape-stomping and gourmet dining, Vicki and Donn struggle just to be nice to each other.

While her fiance overnights in the hospital, Gretchen Rossi lifts her spirits by hosting a burlesque party at her home. Vicki Gunvalson and family tour a million dollar yacht that she hopes to buy despite Briana's protests. Vicki, Jeana and Tamra have a girl's night out to get away from the drama in their lives, but a discussion about marriage and ex-husbands turns the situation contentious.

All hell breaks loose in Lake Havasu as Jeana Keough, Vicki Gunvalson and Tamra Barney converge on the river for the Fourth of July. The new housewife prepares for her daughter's 18th birthday party, and an incident at her home spray-tan party tests her patience when her daughter has a bratty fit.

Gretchen asks Jeff's children to come out from Michigan and rotate visits to their father's bedside, and Vicki faces her fear of needles to accompany Briana to the Red Cross to donate blood. Lynne meets the other housewives for the first time at Orange County's hip new restaurant, but within minutes of arriving, Lynne makes a misstep that leads to some very awkward exchanges. Before the night is over, Tamra and Gretchen square off over Gretchen's treatment of her ailing fiance - completely derailing their budding friendship.

Although Jeff remains in the hospital, Gretchen Rossi still has something to get excited about when her new 5K diamond encrusted engagement ring arrives in the mail. The ladies attend the opening day at Del Mar Racetrack where new housewife, Lynne Curtin, looks forward to getting to know the other housewives better. Drama ensues as Vicki and Tamra snub both Lynne and Gretchen.

Vicki Gunvalson visits her family in Chicago and once again tries to get validation from her less than affectionate mother. Gretchen Rossi is taking care of her gravely ill fiance, Jeff, and reaches the end of her emotional rope. With Simon's urging, Tamra Barney takes an etiquette class and hires a top chef to prepare a formal seven-course dinner for all the housewives, which includes premium tequila tasting. When the tequila shots are served, Tamra and Vicki set Gretchen up for a major fall.

Ryan makes a move on inebriated Gretchen; Jeana finally moves her ex-husband out of her house.

Vicki Gunvalson and Jeana Keough take a road trip to Chicago to visit Vicki's friends from high school and former housewife Kimberly Bryant. With Jeff still in the hospital and her future uncertain, Gretchen Rossi looks to secure her financial well being. Lynne Curtin decides to throw a cocktail party for the ladies, where her unruly teenage daughter, Raquel, helps herself to the bar.

Lynne Curtin seeks her mother's advice.

Jeana Keough and her daughter, Kara, drive up to Berkley to move Kara into her apartment and find themselves strangers among the "bums" and "hippies." Tamra Barney visits her dad in Iowa and puts it all on the line, spilling her heart out to her estranged father, while Gretchen Rossi does Dallas, reuniting with her four best friends from college.

Jeana Keough has her first real date since kicking her ex-husband, Matt, out of the house. Vicki Gunvalson's daughter, Briana, has a new plan for her life that leaves Vicki stunned. It's the end of summer and all the Housewives, past and present, get together.

The postseason recap features interviews with the housewives; host Andy Cohen.

Bravo returns to the real-life Peyton Place that is the exclusive gated community in Orange County, Calif. with never before seen footage from the dramatic fourth season and explosive reunion special.