Relive the love triangles, tragedies, West Beverly high school dances, and other Tivo-worthy times in PEOPLE's Six Most Memorable 90210 Moments. Why six? Because we just couldn't stop at five.
1. BRENDA LOSES HER VIRGINITY
Okay, so it wasn't at senior prom, but during the Spring Dance – while Kelly Taylor (Jennie Garth) is busy being crowned Spring Queen – Brenda Walsh (Shannen Doherty) and Dylan McKay (Luke Perry) are in a room at the Bel Age Hotel going all the way for the first time. Despite fighting with Kelly earlier over wearing the same dress at the dance, Brenda, happy to no longer be a virgin, puts her animosity aside and congratulates her BFF on her crown. –Dahvi Shira
2. BRANDON GETS DRUGGED BY HIS GIRLFRIEND
Brandon Walsh (Jason Priestley) dated a long list of ladies on 90210 – but perhaps his most memorable love was bike-riding bad girl Emily Valentine (Christine Elise). At Emily's suggestion, the gang goes to a wild underground rave. Brandon finally realizes Emily may not be "The One" when he ends up drugged by her with U4EA (aka Ecstasy) and his Mustang Mondale gets vandalized by a random rave-goer. Later, Emily proves to have some serious issues when she attempts to burn down the gang's school float.
3. DYLAN ENDS HIS RELATIONSHIP WITH BRENDA, AND TELLS HER ABOUT HIS SUMMER FLING WITH KELLY
It was the end of an era. After two-and-a-half memorable years of romance, Brenda and Dylan were done. In an episode that understandably brought Brenda to tears, Dylan not only tells her that Kelly is his new girlfriend, but he and Kelly drop the bomb that they snuck around together all summer while Brenda was in Paris. Brenda's response? "I hate you both. Never talk to me again!"
4. DONNA MARTIN GRADUATES
There's no better word to describe Donna Martin (Tori Spelling) at her Senior Prom than "wasted." So, when school principal Mrs. Teasley said her drunken behavior would make her ineligible to graduate with her class, the news didn't sit well with her close pals. Donna's friends were so upset that they managed to round up the entire West Bev student body to protest the decision. In the end, not only did Donna Martin get to toss her graduation cap with the best of 'em, but "Donna Martin Graduates" became an iconic 90210 line.
5. DYLAN'S WIFE IS MURDERED
It doesn't matter how often you've seen it, watching Dylan's wife get murdered is heartbreaking. Before landing the real-life role of Eric Dane's leading lady, Rebecca Gayheart made viewers cry as Dylan's love Antonia "Toni" Marchette. On the night they get married, Toni, mistaken for Dylan while driving his Porsche, is shot to death by a hit man her father hired to kill her husband.
6. BRANDON & DYLAN GIVE KELLY A RELATIONSHIP ULTIMATUM
Kelly finally puts her love triangle with Brandon and Dylan to rest. After being given an engagement ring from Brandon and being offered a trip around the world from Dylan, Kelly makes her choice. She tells her shocked suitors that she's not going to date either one of them, saying, "I've made my choice and I choose me."