`The Hills' follows the personal and professional lives of several young adults living in Los Angeles. Looking for some stability in her life, Kristin attempts to mend fences with Audrina and Heidi, but a rumour about her hard-partying lifestyle gets in the way. Also adding unrest is her relationship with Brody ... or lack of one, now that he has his eyes on someone he's never been able to snare - Audrina. And no one has changed more than Heidi, who looks for the approval of her mother and friends after undergoing numerous cosmetic surgeries. She also has to decide if her marriage to Spencer, now acting more distant than ever, is worth saving.
After last season's heartache, it looks as if Lauren's ready for a fresh start. After being betrayed by friends and losing Heidi to Spencer, are things finally starting to look up? (S3, ep1)
Lauren heads to Laguna Beach to get advice from her mother over her recent situation. Audrina meets up with her former fling, Justin. Spencer proposes to Heidi. (S3, ep2)
Now she's decided to give Justin a second chance, Audrina wants Lauren to get to know her boy better. She invites Lauren to drinks, and Lauren agrees, despite being apprehensive. (S3, ep3)
Now that Heidi and Spencer have had her engagement rock resized at the jewellers, Heidi suggests that her husband-to-be come home with her to Colorado to meet the family. (S3, ep4)
After Justin's disappearing act at Brody's barbeque on the last episode, Lauren thought Audrina's days with the bad boy were over. (S3, ep5)
He's back! Just when you thought Jason was out of Lauren's life forever, it seems that after finishing his stint in rehab, Jason is keen to catch up with Lauren once again. (S3, ep6)
Audrina's back from a weekend away with Justin and she just can't stop smiling. After all the drama, it seems they've decided to officially become a couple. (S3, ep7)
Lauren and Jason have been spending a lot of time together lately, but while at lunch, Jason lets it slip that not only does he have a girlfriend, but they're moving in together! (S3, ep8)
After the drama at Jason's engagement party, Lauren needs to leave The Hills for a while. What better way to escape than to head to Vegas to surprise Brody on his 24th birthday? (S3, ep9)
Jen Bunney texts Lauren saying she wants to talk, but Lauren hasn't heard from Jen since the fallout when Jen and Heidi conspired against her. What could Jen possibly have to say? (S3, ep10)
After kissing Brody in Vegas, Lauren wonders what their status is. Testing it out at dinner, she tells Brody that she hasn't been on a date in weeks. Will he be next on the menu? (S3, ep11)
After weeks of hard work, Whitney thinks she's finally found the perfect place for Teen Vogue to host the Young Hollywood party. But will the old church impress her boss? (S3, ep12)
At her office, Heidi gets a big bouquet of roses from Spencer. It's Heidi's 21st, and Spencer's excited to celebrate the big day with "the best thing that ever happened to him". (S3, ep13)
After the success of the Young Hollywood party, Teen Vogue editor Lisa Love decides to send Lauren and Whitney to cover an event celebrating the power of voting. (S3, ep14)
Just as Heidi's apology didn't make the cut in the last episode, Spencer's hope to elope falls flat when he shares his latest bright idea with Heidi! Whitney goes on a date with a trainer. (S3, ep15)
Lauren's had enough trouble dodging confrontation with Heidi and Spencer, but now Spencer's sister is visiting The Hills, it looks like she's in for another unpleasant run-in. (S3, ep16)
Couples have a habit of making up and breaking up on The Hills, but Lauren still finds herself in relationship limbo with Brody! (S3, ep17)
Lauren and Whitney arrive in Paris, where they are about to cover the "Crillon Ball" for Teen Vogue magazine. Heidi visits her mum in snowy Colorado. (S3, ep19)
After their week in Paris, Lauren and Whitney are back home and have to deal with what happened. Will Whitney be able to follow her dream and change her career? (S3, ep20)
Tension arises when Stephanie Pratt and Lauren find themselves in the same class at fashion school. Meanwhile, Whitney tries to impress her new boss in New York. (S3, ep21)
Get your acrylic claws out! It's Lauren's birthday and for some guests an appearance at her party could mean a lot of trouble. And from whom will Lauren receive a birthday kiss? (S3, ep22)
It's the aftermath of Lauren's birthday and everyone is talking about Lauren's friendship with Stephanie. Audrina is approached by someone unexpected, much to someone else's discomfort. (S3, ep23)
Lauren is surprised by a job offer she receives. Meanwhile, Heidi enjoys a night out with her friends... until she spots Spencer and a massive fight breaks out! (S3, ep24)
Lauren and Lo plan to buy a house and are looking into the real estate market. Meanwhile, Audrina reconsiders her situation as a single woman and Heidi tries to talk to Lauren again! (S3, ep25)
The girls go out to find a new home. When they do finally find one, the guest list for the housewarming party may be subject to more than one argument. (S3, ep26)
While Lo and Lauren enjoy living at the house, Audrina feels more and more left out. Meanwhile, Stephanie thinks it time to get rid of Spencer and Heidi. (S3, ep27)
Tension continues to grow at Lauren's house and she confronts Audrina about it. Spencer chases Heidi to Las Vegas and puts her career at risk. Last in the series. (S3, ep28)