It is later revealed that the father of Adrianna's child is Ty, although it is unclear when they slept together.She and Navid get back together when he realizes that even though she is a mess he can't get over her, and get engaged, although he alienates his family when he tells them that the child is not his and gets upset when Adrianna reveals her daughter is Ty's.
Guilt-ridden, Kimberly does her best to solve the case, giving Ryan his job back, although he takes a leave of absence to rethink his life, and Adrianna lands in rehab, after almost getting Naomi in legal troubles as she took the blame for the drugs.
There, she begins a relationship with Navid Shirazi, head of the school's paper and Dixon's best friend, who paid for her rehab.
90210 (stylized as 9O21O), is an American teen drama television series, developed by Rob Thomas, Gabe Sachs and Jeff Judah, that aired on The CW from September 2, 2008 to May 13, 2013.
It is the fourth series in the Beverly Hills, 90210 franchise created by Darren Star. Like its predecessor, the show follows the lives of several wealthy students attending West Beverly Hills High School in the upscale and star-studded community of Beverly Hills, California.
Adrianna later discovers she is pregnant as a result of her promiscuity while she was addicted.
After telling Navid of her pregnancy, he breaks up with her.
The show later focuses on the same group of friends when they graduate and begin their lives in the adult world.
Some attend college at California University, while others begin exploring avenues beyond post-secondary education.
Soon Naomi and Liam begin a romance, and once she becomes friends with Annie again, Liam's repetitive indecisiveness begins as he starts to pursue the both of them.