One-Hit Wonderful

Lauren returns to her questionable hairstyle comfort zone, Heidi stumbles at a Bolthouse event, Audrina gets a castle of her own, and Frank and Meredith confuse The Hills timeline.

Cameron fails to defend Stephanie in front of Brody, Chiara acts as the voice of reason, Justin redeems himself slightly after Cabo, and Audrina sends Corey packing.

The gang lives it up in Cabo, Justin and Audrina fight over a hair accessory, Stephanie introduces her new boyfriend to Spencer and Heidi, Meredith recounts her trip to LA, and Frank gets lit.

Life gets busy, work requires a trip to Los Angeles, and Frank and Meredith are forced to take a break.

The gang parties in Malibu, Heidi tells Holly to move out and pins it on Spencer, and Audrina rekindles her romance with Corey while holding out for Justin.

Lauren hits the town with Holly, Holly encourages Heidi to write Lauren a letter, Audrina plays the field, and Diana Metzger joins Frank and Meredith.

Heidi and Spencer get a surprise visitor, Lauren and Brody assume that everything is their business, and Stephanie and Doug fail at covering up their tryst.

Lauren travels to Italy, Audrina and Lo become friends overnight, Heidi and Spencer return to the social scene, and Stephanie makes a play for Doug.

Audrina works a big event for Epic, Lauren reunites with Holly, Heidi misses having friends, and Stephanie continues to make questionable style choices.

Spencer tells Holly to move out, Whitney styles a special guest, Lauren cries black tears over her relationship with Audrina, and Frank shares his final thoughts on Whole 30.

The gang parties in Las Vegas, Lauren and Audrina stop speaking, Brody puts Stephanie on blast, and Holly makes herself at home at Chez Ambien.

Whitney goes on a date in New York, Stephanie tries to win Spencer over with gifts, Lauren breaks it off with Doug, and Frank and Meredith struggle to stay awake.

Lauren keeps trying to make Doug happen, Stephanie invites everyone to her birthday party, Spencer questions his sister's loyalty, and Frank and Meredith question everything about this episode.

The girls throw Audrina a birthday party, Lauren revisits another high school romance, Heidi's sister visits to Spencer's dismay, and Lo makes a half-assed effort to be a cordial roommate.

Distance grows between Lauren and Audrina, Spencer sets out to win Heidi back with Stephanie in tow, and Frank and Meredith finally finish season three.

Lauren and Lo fail at spending time with Audrina, Heidi travels to clear her head, Spencer returns to Chez Ambien, and Meredith gives Frank his birthday gift.

The girls throw a housewarming party, Lauren and Audrina both have dates with the past, Heidi changes her tune with Stephanie, and Frank makes a big ask.

Heidi weasels her way to the VIP table, Justin Bobby reappears after a lengthy hiatus, and Lauren and Lo make housing plans behind Audrina's back.

Lauren and Whitney are professionally reunited, Heidi enjoys a night out until Spencer shows up to ruin it, and Frank spies a Bravolebrity in the background.

Heidi relives her club-going glory days and runs into Audrina, Lauren expects the world to revolve around her, and Stephanie plays both sides.

Lauren celebrates a birthday, Stephanie's loyalty shifts further, Spencer retrieves the rest of his toys, and Heidi's wardrobe goes Hollywood.

Lauren befriends a classmate, Stephanie acts like a brown noser, Whitney revolutionizes pants, and Frank recalls his Dark Summer.

Whitney moves on from Teen Vogue, Spencer moves in with Stephanie, Lauren gives Brody the cold shoulder, and Kelly Cutrone makes her Hills debut.

The girls travel to Paris, Heidi retreats to Colorado, Spencer makes an awkward romantic gesture, and Lauren shows everyone how to ruin a ballgown.

Teen Vogue gives Whitney another opportunity, Lauren pouts and then gets what she wants anyway, and Heidi takes time away from Spencer.