Vanderpump Rules, Reunion - Part 1

In the Season Four premiere, Lisa Vanderpump vows to take SUR restaurant to new heights. Scheana throws a costume party for her 30th birthday, but when Kristen shows up, Ariana and Sandoval accuse Scheana of being a fake friend. James's reckless behavior threatens his DJ career, Schwartz realizes he's ready to commit to Katie, and a visit from Jax's mother offers rare insight into his life before SUR.

When Lisa Vanderpump brings new blood to the shark-infested waters of SUR, Katie and Scheana quickly teach new girl Lala that there's no such thing as a secret at Lisa's restaurant. Rumors spread that James was unfaithful to Kristen, and Kristen must make a tough choice about who to believe. Jax imports a new girlfriend from Kentucky and Scheana continues to feel the heat from Ariana over her friendship with Kristen.

When Scheana and Katie bust Lala for lying about a modeling job in Italy, Lisa Vanderpump turns the table on them for picking on the new girl. Scheana worries her marriage may be in danger when it's revealed that her husband has been keeping secrets. Tom and Ariana try "adulting," Jax and James compete for Lala's affection and Tom Schwartz makes a big step towards committing to Katie.

Lisa Vanderpump and the SUR crew force Scheana to reassess her marriage. Jax campaigns to get his new flame a job at SUR, even while things heat up between him and Lala. Sandoval and Schwartz pitch Lisa a business plan. Kristen and James seek couple's therapy.

Convinced that Kristen is cheating on him, James seeks revenge by hooking up with Lala. Lisa schools her staff on fine wine, Katie and Ariana urge Scheana not to sweep marital problems under the rug, Peter chops his ponytail, and a jealous Jax recruits Kristen in his scheme to pull Lala away from James.

Love is in the air as Lisa tries to outdo herself by throwing not one but two huge parties for Gay Pride. Jax moves in on Lala and James sports fresh love bites.

Lisa treats a group of underprivileged kids to the full SUR experience and Jax is ready for the next step with Brittany.

Lisa advises the girls to get back at their boyfriends for going to Vegas, so Lala, Katie and Ariana literally kiss and make up at Scheana's sleepover.

Despite all the years between them, Sandoval and Schwartz still havent learned that what happens in Vegas certainly doesn't stay in Vegas.

Tom Schwartz finally mans up and plans to get down on one knee for Katie, but will his complicated proposal scheme will end in disaster?

Stassi's up to no good, much to the chagrin of Lisa and a newly engaged Katie takes her engagement ring on a victory lap at SUR.

Drama follows the team to Hawaii where Lala tries to come clean about her flirtation with Jax and Tom discovers Scheana sent texts about him to Ariana's mom.

While the SUR crew parties in Hawaii, Stassi visits Kristen in LA and finally reveals the truth about her sex tape. Ariana rejects Scheana's fake apologies.

Accused of felony shoplifting, Jax must answer to the courts and, worst of all, Lisa Vanderpump. Stassi finally tells the whole story of her sex tape crisis.

Katie launches her website with a high-profile party, but a surprise appearance and an unexpected text message threaten to ruin the event.

When Stassi runs into her old SUR crew at Lala's house party, Scheana must finally answer for her part in Stassi's sex tape scandal.

Katie's beach party gets even hotter when Kristen and Ariana have it out, and Ariana makes a stunning statement that leaves Scheana and Katie speechless.

Katie surprises Stassi in Palm Springs, James convinces himself that Kristen is still the answer to his problems, and Scheana worries that she's losing her friends.

Katie's determined to host her engagement party at Villa Rosa but Lisa has more than a few issues with the guest list. Jax takes a hard look at his life.

Lisa hosts Katie and Tom Schwartz's engagement while guests of dishonor Kristen and Stassi stir up trouble, and trash-talking Lala creates a scene.

The reunion kicks off with Kristen in the hot seat and Mike Shay makes his first reunion appearance as he opens up about his struggle with addiction.

James discusses those notorious bite marks from Gay Pride. Katie and Tom Schwartz talk about their proposal, and Brittany joins the reunion for the first time.

Stassi clashes with Lisa on the handling of her sex tape and tensions escalate when James and Jax's explosive argument comes to near blows.

Catch the never-before-seen revealing, embarrassing, and most hilarious scenes you didn't see this season.