Naomi seduces a police officer before she gets arrested, while Liam is back from fishing to present Annie with an engagement ring.
Summer is over when "90210" returns on Tuesday, September 13 at 8/7c on The CW and everybody is ready for college. Revealing she is pregnant at the end of season 3, Naomi will land on another trouble since she is seen getting arrested and posing for her mugshot in a promo for the upcoming season 4. A glimpse of her possible new admirer Austin (Justin Deeley), who is described as a sexy cowboy and son of a country music star, is also offered in the sneak peek.
Meanwhile, Liam is ready to take his relationship with Annie to the next level as he is seen presenting her with what looks like an engagement ring. However, it seems that Annie will turn down the proposal because recent spoiler revealed that Liam will get a new love interest, a widow named Jane (Kristina Apgar).
"American Idol" alum Kellie Pickler will make her acting debut on the teen drama series, playing a country singer named Sally who is also Austin's cousin. Other new characters in the fourth season include Holly (Megalyn Echikuwoke) who will be Naomi's college rival, and Nick (Sean Wing) who will fall for one of the female characters.