In the eighth season opener, Kyle and Lisa Vanderpump charter a private jet to take the ladies to Las Vegas for a group birthday celebration, but the question of whether Lisa Rinna will join lingers. Dorit's new friend Teddi hits it off with Lisa Vanderpump over drinks and they invite her along for the ride. Lisa Vanderpump assesses her friendship with Erika and begins to see their relationship in a different light. The ladies let loose in Sin City, with familiar faces Adrienne Maloof and Camille Grammar joining the festivities.

Teddi's job as an accountability coach leads to questions among 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.

As she writes her memoir, Erika is forced to revisit her past and gets emotional about her father. Lisa Vanderpump helps PK throw a lavish birthday dinner for Dorit - and the unlikeliest of guests gives a speech. Teddi starts to question Dorit's character when Dorit speaks badly about Lisa Rinna. Meanwhile, 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; 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; Teddi's spa day doesn't provide relaxation.

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.

Lisa Rinna returns to Days of Our Lives. Kyle and Lisa V address their issues at Teddi's beach house.

While still in the Big Apple for Fashion Week, Dorit attempts to come clean with Lisa Vanderpump, but Lisa isn't sure she's getting the whole story. Erika meets with her publisher to give an update on her book. Meanwhile, Kyle gets wind of what Dorit has been saying about her from Teddi. And what should be Dorit's big night turns into a big altercation.

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 is surprised by her own emotions as her Hollywood journey comes full circle. Dorit tries her best to repair her relationship with LVP, but ends up experiencing a side of Lisa she's never seen before.

Erika and Lisa Rinna meet up with old friend Eileen Davidson for drinks. After unexpectedly finding her dream home, Kyle struggles with the decision 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 newfound friendship with Dorit -- but when the dust settles, it's Erika who Teddi finds herself at odds with more than ever before.

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

Kyle packs her house for her upcoming move. Lisa Vanderpump's documentary about dog abuse in China premieres at a film festival. Dorit races to finish her swimwear collection on time, and then suffers the consequences when she becomes sick on the way to the girls' trip to Berlin. Lisa Vanderpump is stunned when Kyle - her friend of ten years - doesn't remember someone very dear to Lisa's own heart.

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 reunion kicks off on with the ladies diving into unresolved issues. Erika discusses the public's reaction to her book and reveals surprising news. Meanwhile, Lisa Rinna explains the reason behind her change in behavior, but not everyone in the group is buying it. When Lisa Vanderpump, Kyle and Dorit attempt to delve into their seemingly derailed friendship this season, hurt feelings come to a head.

Strong emotions persist as Dorit and Teddi struggle to sort out a year of misunderstandings. Kyle reveals the devastating details of her house burglary last Christmas. Then, Camille Grammer joins the ladies and brings an unexpected gift for Andy. And Lisa Vanderpump finds herself in the hot seat when she defends her reaction to Dorit's betrayal.

As the reunion concludes, Andy explores the reasons behind Lisa Vanderpump's fall-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 when discussing her sisters' lack of support around her new projects. All the while, Teddi and Erika confront each other over "pretend amnesia."

In never-before-seen footage from Beverly Hills, Teddi goes shopping for a new sports car with her husband and is shocked by its high speed - and its high price tag! Dorit and her bestie, Boy George, are curious about Teddi's job. Erika and Camille are slightly mortified when Lisa Rinna makes a questionable joke about Lisa Vanderpump. Kyle plans to build a new beach house in Mexico. Camille's search for the perfect gift for Dorit takes her to the Museum of Sex in New York City.