The New York City women are featured in previously unseen footage of diva drama.

It's a birthday blitz when Ramona plans a sweet-16 party for Avery, LuAnn meets with a party planner for her own daughter's 16th birthday, and LuAnn throws a surprise birthday bash for Jill.

LuAnn tries to hit a high note. She plans production on her music video and invites her fellow Big Apple wives to participate. Meanwhile, Sonja's attempt to form a friendship with Cindy results in catty drama; and Alex throws an art party.

Part 1 of 2. Andy Cohen hosts a reunion edition featuring the Big Apple ladies.

Conclusion. Andy Cohen hosts a reunion featuring the regrouped New York ladies. Topics include Season 5's confrontations.

Previously unseen footage from "The Real Housewives of New York City" includes the ladies' business ventures, vacation dramas, snippets of the wives speaking in "baby talk," and the discovery of a prosthetic leg.

Aviva lands a book deal for her memoir and enlists Carole for help, but their lunch quickly turns awkward when discussing the issue of ghostwriters. Elsewhere, Sonja has dinner with Aviva's former husband; and Aviva hosts a housewarming gathering.

A fiery fight between Carole and Aviva impacts a party, shocking all attendees. Elsewhere, Ramona tries to accept that her daughter is growing up, and Kristen is pressured to participate in a demanding mud run.

The ladies journey to the Hamptons to see Sonja perform in a burlesque act for charity. Elsewhere, LuAnn returns to host a Hamptons barbecue, but a fiery argument erupts.

Battles continue at LuAnn's barbecue. Elsewhere, Sonja tries to clear the bitter air by hosting a brunch; Carole receives an honor at a Coney Island parade, spurring the other ladies to strut the boardwalk dressed as seagoing drag queens; and Aviva faces her greatest fear.

Ramona returns from Africa with renewed inner peace and tries to bring the feuding Heather and Aviva together; Kristen and Carole meet up with Beverly Hills housewives Brandi Glanville and Yolanda H. Foster; and Heather hosts an anniversary party.

The Fourth of July in the Hamptons leads to interpersonal fireworks. Here, Kristen and Ramona clash; Ramona and Sonja butt heads; and tensions boil over at a clambake when Aviva approaches Carole to settle differences.

Kristen worries about Sonja's business plan and enlists her business-minded husband to analyze it. Meanwhile, Carole meets with a matchmaker; and Heather invites all the ladies, except Aviva, to her vacation home, where Ramona stirs up tension.

The ladies confront Ramona about past behavior. Elsewhere, marital dissension plagues Kristen; LuAnn invites Carole on a double date; and Ramona sets out to make peace with Kristen.

Sonja reaches out to a spiritual healer. Meanwhile, Kristen auditions for a workout video; Aviva's father returns with a surprise; and the ladies assemble for a memorial for Sonja's dog.

Aviva's father delivers shocking news to his 25-year-old girlfriend, and LuAnn hosts a weekend getaway of horse racing and partying, leading to rising drama when Sonja celebrates a little too much.

A Saratoga trip ends with a wives-gone-wild night on the town. Later, Ramona bonds with Avery before her college departure; Sonja's facialist spreads gossip to Kristen; LuAnn throws a charity auction; and Aviva hosts an art party.

The ladies head to Montana, where they take part in a cattle drive. Later, there are beefs at dinner when LuAnn and Sonja clash over gossip spread by a facialist.

A Montana trip continues with tensions lingering between Sonja and LuAnn. Meanwhile, the ladies participate in outdoor activities and a modern-day treasure hunt, but the group divides thanks to a tiff between Heather and Kristen.

Heather and Kristen continue to clash, forcing some of the women to take sides. Elsewhere, the ladies take in a rodeo show and a final outdoor Montana dinner.

The wives return from Montana as Aviva discovers she's been the butt of jokes. Meanwhile, Ramona's husband prepares for an open-mic gig. Heather and LuAnn are also slated to perform, but drama soars when LuAnn backs out.

Carole hosts a lavish party to celebrate her birthday. Sonja is presented with a present from Aviva's ex-husband Harry.

Sonja has a confrontation with Harry and LuAnn. Aviva makes her return to the group, which causes insults and accusations to be thrown around between the ladies.

Part 1 of 3. The Big Apple ladies gather for a reunion hosted by Andy Cohen. Included: Ramona is cornered about her behavior toward Kristen in Montana; Aviva addresses her use of foul language in front of children; and Carole confronts Sonja about rumors and gossip.

Part 2 of 3. The details of the "Bookgate" feud unravel; Ramona explains her dislike of the Berkshires; Luanne confronts Sonja; Andy asks Ramona about the state of her marriage; LuAnn retaliates against Ramona.