Kyle and Lisa Vanderpump charter a private jet to take the ladies to Las Vegas for a group birthday celebration. Dorit's new friend hits it off with Lisa Vanderpump over drinks. Familiar faces Adrienne Maloof and Camille Grammar join the festivities.

Teddi's job as an accountability coach leads to questions amongst the group. Lisa Vanderpump takes Erika to task for not responding whenever she reaches out. Kyle and Dorit confront Lisa Rinna while on a Ferris wheel overlooking the Las Vegas strip.

Erika revisits her past as she writes her memoir; Lisa Vanderpump helps PK throw a lavish birthday dinner for Dorit; Teddi starts to question Dorit's character when Dorit speaks badly about Lisa Rinna; Kyle vacations with her family in Croatia.

Lisa Rinna and Erika jet off to Tokyo to support Amelia and Delilah's latest modeling gig, but "momager” Lisa comes to the realization that the girls might not need her there as much as she thought. Dorit agrees to model for Lisa Vanderpump's magazine, but the photo shoot is not what she expected. When the power goes out at Kyle's dinner party, the darkness brings out the worst in one housewife, leading to an explosive outburst.

Kyle laments not being able to share her newfound success as a television producer with her sisters. Dorit relaunches her swimwear line, but a business meeting inadvertently causes friction with Teddi. After returning from Tokyo, Erika is shaken when she receives unexpected news. Lisa Vanderpump advises Dorit to make things right with Camille.

Dorit searches for the perfect birthday gift for PK, and takes Erika to test drive an insanely luxurious car. Lisa Rinna worries about her daughter's upcoming move to New York City. Lisa Vanderpump confides in Kyle about the lawsuit brought against her and Ken – and later criticizes Lisa Rinna for talking about it behind her back. Teddi's spa day is everything but relaxing.

Kyle worries when she's late for a double date with Teddi and their husbands. Lisa Rinna hustles her way into two new acting gigs. Dorit shocks her husband PK with an extravagant 50th birthday party on a yacht. Erika and Lisa Vanderpump have differing opinions about Dorit's big surprise, and a wine glass is at the center of a new conflict.

Lisa Rinna returns to her roots, and the role of Billie, on Days of Our Lives. Lisa Vanderpump receives news about the lawsuit, but Kyle and Dorit don’t react to it the way she hopes — prompting Lisa to walk out on them. Teddi’s concerns about hosting the women at her beach house come true when Kyle and Lisa Vanderpump waste no time addressing their latest issues in front of everyone.

Teddi’s beach house weekend ends abruptly—and disastrously—when Dorit reveals to Erika what was said about her after her unexpected departure. The ladies descend upon New York for Fashion Week. Lisa Rinna helps her daughter, Delilah, get settled in New York City. Private information about Lisa Vanderpump is revealed publicly—and some of the ladies worry how she’ll react once she finds out.

Dorit attempts to come clean with Lisa Vanderpump; Erika meets with her publisher to give an update on her book; Kyle gets wind of what Dorit has been saying about her from Teddi; an altercation arises on what should be Dorit's big night.

With front row seats to New York Fashion Week, Dorit tries to get back into Lisa Vanderpump's good graces, while Kyle wants an apology from Lisa but doesn't think she'll get one. Erika comes face to face with Kyle's old friend, Bethenny Frankel, who was critical of Erika's music the last time they met. Lisa Rinna's daughter is already feeling homesick. Teddi persuades Lisa Vanderpump to do the unthinkable.

Erika's Hollywood journey comes full circle; the women attend Camille's charity event, where Teddi's motives are brought into question; Dorit tries to repair her relationship with Lisa Vanderpump; Camille attempts to silence Dorit once and for all.

Erika and Lisa Rinna meet up with old friend Eileen Davidson for drinks; Kyle must decide whether to stay in her current house or move; Erika strikes a pose for her book cover; Teddi drops a bomb that could damage Lisa Rinna's friendship with Dorit.

Teddi worries about seeing Erika at Lisa Rinna's luncheon; Kyle's séance conjures up unexpected guests, but the group gets a bigger shock when Erika reveals information about her past; Lisa Vanderpump is struck by tragedy at home.

Lisa Vanderpump's documentary about dog abuse in China premieres at a film festival; Dorit races to finish her swimwear collection on time, then suffers the consequences when she becomes sick on the way to the girls' trip to Berlin.

A peaceful horseback ride through the German countryside takes a dangerous turn for Kyle and Lisa Rinna. The ladies get emotional while visiting the Eisenman Holocaust Memorial and Berlin Wall. The group gets into the Oktoberfest spirit when they spend the night dancing at a Berlin beer hall.

As the Berlin trip concludes, one of the ladies can’t seem to be on time to any of the scheduled events; surprisingly, it’s not Dorit. "Pretend amnesia” rears its ugly head again, and Erika is surprised to hear how Teddi truly feels about her. Kyle’s still upset with Dorit but chooses to ignore her own feelings for the sake of the trip. Dorit stresses over final preparations for her fashion show—and fears she won’t be able to pull off her big comeback.

In the season finale, Dorit launches her swimwear line with a glamorous fashion show that could make or break her design comeback. Camille shares life-changing news. Lisa Rinna worries about Delilah being homesick in New York. Kyle expresses her feelings about Dorit, but it causes an unexpected rift with Erika. Lisa Vanderpump is forced to reveal a hard truth to Dorit.

The women dive into unresolved issues; Erika discusses the public’s reaction to her book; Lisa Rinna explains the reason behind her behavior; Lisa Vanderpump, Kyle and Dorit discuss their friendship, and hurt feelings come to a head..

Andy explores the reasons behind Lisa Vanderpump's falling-out with Dorit; as the ladies relive their trip to Berlin, they question why Lisa Vanderpump was so upset with Kyle for not remembering her grandmother's name; Kyle gets emotional.

Teddi and her husband go shopping for a new sports car; Dorit and her bestie, Boy George, are curious about Teddi's job; Erika and Camille are mortified when Lisa Rinna makes a questionable joke about Lisa Vanderpump.