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 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.

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.

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.

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.

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.

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.