

Adrianna later discovers she is pregnant as a result of her promiscuity while she was addicted. At first she only stays to "repay" him, but they start to genuinely care for each other. Adrianna lands in rehab where she begins a relationship with Navid Shirazi, head of the school's paper and Dixon's best friend. When Harry decides to clean up the school with the help of an under-cover cop, Kimberly MacIntyre, Adrianna finds herself caught in the middle of the investigation. Naomi's best friend, fallen starlet Adrianna battles drug addiction this season. Their fued eventually pushes Naomi out of the "in crowd." Their mothers find themselves in a love triangle as well, after Tracy's marriage to Charles Clark implodes. The half-sisters (Naomi and Annie) alternate between friends and enemies in a love triangle. Ethan gets back together with Annie, whom he had a fling with several years prior.

Tracy has a daughter of her own, Naomi, who dates jock Ethan Ward, with whom she soon breaks up with.

All of them struggle to adjust to their new lives: Annie has a hard time balancing romances (starting with rich kid Ty) and friendships as well as popularity and identity Dixon has issues with his adoption and African-American heritage Harry and Debbie struggle with the revelation that Harry has a son with Tracy Clark, his former high school sweetheart. Harry is actually from Beverly Hills and comes back both to look after his mother Tabitha and to work as the principal at West Beverly Hills High. Much like the original series, Beverly Hills, 90210, 90210 follows the move of a family (parents Debbie and Harry Wilson, their daughter Annie and adopted son Dixon).
