It’s a new beginning for this iconic group of friends, as they return to the Hills and reconnect for the first time in years. While facing new challenges, old rivalries and romances collide as they find that sometimes the past is not the past.

Leading up to Heidi and Spencer's vow renewal, Spencer pries into Brody's personal life, Brandon and Ashley have a difficult conversation, and Whitney opens up to Kaitlynn.

Brody and Kaitlynn survey the damage to their home after the Malibu fires, Mischa prepares for a high-stakes movie audition, and Heidi tries to revive her pop music career.

Brody lashes out after he hears what Stephanie said in Las Vegas, Justin brings an unexpected guest to Frankie and Jen's Friendsgiving dinner and Audrina and Stephanie clash.

The group's vacation takes a turn when Kaitlynn unexpectedly comes face-to-face with Brody's new flame; an unlikely connection begins to blossom.

Stephanie tries to repair her relationship with Spencer, Mischa faces down her longtime bully Perez Hilton, and sparks continue to fly between Justin and Audrina.

Brandon throws a big pool party, Justin sends Audrina mixed signals, and tempers flare when Spencer and Brody reveal their issues with each other.

Brody opens up about his fractured relationships, Heidi and Spencer's business turns personal, and Audrina confronts Justin after he denies kissing her.

The group heads to Vegas to see Brody’s DJ performance, and Justin finds himself in the middle of a showdown between Audrina and Stephanie. Wildfires tear through Malibu, and Kaitlynn fears for Brody’s life when he stays inside the evacuation zone.

Brody and Kaitlynn are at odds on having kids, Brandon is reluctant to define his relationship, and Audrina and Stephanie's beef boils over at Heidi's bachelorette party.

Jason opens up about his relapse, Audrina reconnects with her ex Ryan Cabrera, Spencer plans an anniversary surprise for Heidi, and Kaitlynn hosts a black-tie gala.

While in Santa Barbara for Heidi and Spencer's vow renewal ceremony, Heidi introduces Brandon to someone new, Justin and Audrina reconnect, and Kaitlynn confronts Ashley.

Brody and Heidi's friendship is at a crossroads after dinner turns into an explosive argument. Brody wonders if Amber is right for him.

Kaitlynn breaks the news to Brody about her pregnancy but worries about him and Kris meeting face to face at the retreat. The Pratts and Wahlers finally tackle the feud that has divided the group. Justin learns the importance of maintaining connections

Brandon tries to broker peace between Brody and Stephanie, Kaitlynn resents the rumors about her marriage, and the friends show up to support Audrina's swimwear show.

Heidi and Spencer are shocked to learn their behavior has become a topic of discussion. Audrina finds herself at a crossroads with both Brody and Sean; meanwhile Caroline makes a bold declaration about her true feelings for Kaitlynn.

The gang celebrates Kristin Cavallari’s visit to LA. Tensions brew between Heidi and Audrina. Justin and Jason strengthen their friendship. A good night turns into a good morning as Brody and Audrina finally put their chemistry to the test.

Brody and Audrina explore new romances; Brandon takes his relationship to the next level; Heidi and Spencer struggle to agree on expanding their family.

At Speidi’s wellness retreat, rumors swirl about Kaitlynn being pregnant. Brandon reveals shocking news about his relationship. The Wahlers struggle to find peace with the Pratts, who are distracted by some potential life changes of their own.

After almost a year apart, the group reunites to bury the past with the hope of starting anew; Brody attempts to reinvent his body and soul as he focuses on making amends with Kaitlynn post breakup.

After Kristin grills Brody on his “sleepover” with Audrina, rumors swirl during a getaway to Lake Tahoe, making Kaitlynn feel left out. Caroline confronts Kaitlynn over their icy friendship, as Jason hears that Spencer is questioning his sobriety.

Brody and Audrina’s flirtation heats up. The war between the Pratts and Wahlers reaches a boiling point, while Brandon is left out in the cold by Dani’s chilly response to them moving in together. Audrina and Heidi find their friendship at a crossroad.

Kaitlynn’s decision to move in with her boyfriend leaves everyone wondering what’s really going on. Heidi and Spencer worry about the future of their business. Brandon starts to re-evaluate his relationship, while Audrina gets a wake-up call about Brody.

Heidi and Spencer seek help with their dire financial situation; a fling from Brandon's past threatens to derail things with Dani.