1. Season 1, Episode 1: "Pilot" - The pilot episode of the series introduces the main characters and sets the stage for the drama to come.
2. Season 1, Episode 3: "The Hills Meet the City" - In this episode, Lauren Conrad moves to Los Angeles and meets her new roommates, Heidi Montag and Audrina Patridge.
3. Season 1, Episode 4: "I Lied" - This episode features one of the most iconic moments of the series when Lauren confronts Heidi about lying about her age.
4. Season 2, Episode 11: "The Apology" - In this episode, Lauren and Heidi finally make up after their dramatic falling out.
5. Season 3, Episode 10: "The Best Laid Plans" - This episode features the dramatic conclusion to the love triangle between Lauren, Brody, and Kristin.
6. Season 4, Episode 11: "The Hills Aftershow" - This special episode features the cast of the show reflecting on their time on the series and discussing their lives after the show ended.
7. Season 5, Episode 1: "The Hills Rewind" - This episode features a look back at some of the most memorable moments of the series, including iconic fights and dramatic revelations.