The third and final season of the teen drama television series South of Nowhere originally aired between August 10, 2007 and December 12, 2008 on The N in the United States. The season consisted of sixteen episodes all airing on Friday nights. The season was split in half with the first half airing in the fall of 2007. The second half was originally to air in the Spring of 2008 but was pushed back to fall 2008 after the cancellation of the show caused massive outcry by fans of the show. By pushing back the second half the network was able to film short videos of the cast and crew talking about how much the show had changed their lives. It also allowed the cast and crew the chance to film two additional webisodes to wrap up the season and the series.
Moments after the drive-by shooting at the King High prom, ambulances rush the victims to the ER, and everyone realizes that nothing will be the same again. As Spencer and Ashley re-chart their existence in the aftermath, their relationship might not be strong enough to take the strain.
Ashley and Kyla have $25 million to spend, and they're starting by dropping a chunk of it on a gorgeous new loft as far from Ash's mom as possible. With the two of them finally acting like sisters, maybe Ashley doesn't even need Spencer anymore. Not like she has a choice, Spencer's done with her and is moving on... to the last person she expects. Meanwhile, when the MTV documentary about the prom shooting finally hits the air, Chelsea and the Carlins are forced to come to grips with Clay's death.
Spencer's done with Carmen, and just in time too, Ashley needs her support, because an old friend from New York is ready to make her famous. Meanwhile, Aiden and Madison figure that since they're both unattached, maybe they could try attaching every once in a while. And Glen discovers that Chelsea is thinking of changing her plans for the baby, but plans sometimes have a way of changing themselves.
Jake's working hard to make Kyla the new It girl, but when she finds out that Ashley's poised to out-It her, It hits the fan. Aiden's there to see it splatter, and realizes that he might be splattering along with it. Meanwhile, Spencer discovers that guys have a hard time distinguishing being with her from being with her.
Spencer wants someone to help her show her pride, but everyone's too busy worrying about themselves. Spencer surprises Ashley. Chelsea tries to deal with the fact over losing her baby; Meanwhile Kyla's success has brutal results for her future. The Gang has a party to remember the good times.
Spashley's back, and this time Ashley's the one looking for commitment. Glen gets fired by Jake because he wasn't there for Kyla when the photographer cornered her from the night before. Glen comes home to find Arthur "son-ing" Aiden, who is also dating the new girl, Sasha Miller. Meanwhile, Jake decides to scam Ashley and make Kyla's voice on the cd fake, seeing as how she can't sing.
Spencer's grandmother comes to visit for her special day. Spencer has a hard time telling her grandmother about her newfound sexuality. Meanwhile, Spencer gets to know Lily's girlfriend, Jonica. Kyla and Ashley are asked to sing on national television, they embarrass themselves live, all thanks to Kyla and her fake voice. Meanwhile, Glen becomes hurt when he witness Aiden spending quality time with his father.
Ashley and Spencer can't seem to get any alone time together once Jonica interrupts. Kyla also decides to come clean to Ashley about fake record voice. Ashley is furious and forces Kyla to apologize in front of everyone on national television. Jake becomes infuriated with her and Kyla dumps him. Meanwhile, Glen and Arthur invite Aiden to go camping with them in the Sierra Mountains. Once there, Glen finally breaks down over how much his father prefers Aiden over him. Lastly, Ashley and Kyla make up, but not for long once Ashley witnesses a video Kyla made.
Ashley watches the video of a high Kyla, admitting to the world that Ashley is a whore and her father was a joke. Ashley feels betrayed in the most ultimate way and forces Kyla to get out. Unfortunately, she has nowhere to go. Meanwhile, Aiden tries to make a better connection with Sasha. Eventually, when he doesn't make it into her school, she dumps him because she doesn't think he is a good enough person. Glen and Chelsea become closer and finally give in to their tension, while Jonica continues to flirt with a drunk Spencer. Once Spencer gives in and makes her move on Jonica, the truth comes out that Jonica is only flirting for fun. In the end, Ashley shares her special birthday song she wrote just for Spencer and forgives her for the mishap with Jonica.
Glen finally finds love, but Chelsea has a hard time accepting the new feelings, on account of Clay. Meanwhile, Aiden attempts to defend Kyla, while Ashley wants nothing to do with her. Soon after, everyone realizes that the video of Kyla was edited together by Jake, and Ashley ends up forgiving Kyla, letting her stay. Elsewhere, Sean returns from New Orleans to help Chelsea with her memorial presentation and try to win her over in the process. In the end, while everyone has dinner at the Carlins to celebrate the day, Glen finally confesses his love to Chelsea at the dinner table and everyone, including Chelsea herself, is left utterly speechless.
Everyone deals with the aftermath of Glen's confession. Sean slowly learns to accept Chelsea's decision to be with Glen. Carmen returns afters a few surprise appearances on the street. She persuades Kyla to let her live with her and Ashley. Also, Madison returns from her tour with Justin Timberlake, but only for awhile until the European tour starts up. Meanwhile, Ashley is nervous about having Spencer go off to college life without her. Lastly, Aiden gets into a motorcycle accident.
Ashley tries to go over a solo artist plan with Ethan, but it seems almost impossible with Madison's return. Ethan hired her to sing Ashley's songs. He wants them to be partner's, but is having no luck in getting the girls approval. Ashley wants her songs to herself because they came from her heart, and she doesn't want anyone else to sing them but her. Spencer encourages Ashley to take the deal, while Carmen sees Ashley's point of view and tells her not to. In the end, Ashley and Madison work out a system that leaves them with brand new songs for Madison that still have Ashley's flair in writing. Meanwhile, Aiden is feeling better from his accident, but Kyla seems to be the one having to snap some sense into him by slapping and kissing him. Also, Carmen looks for a place to live, but ends up wanting to reside with the Davies Girls.
In the one hour series finale episode, Spencer must consider her future with Ashley, who seems ready for commitment. Meanwhile, everyone else gets ready to move on to the next chapter on their lives. Glen and Chelsea take the final step in their relationship by making love, while Aiden and Kyla are finally back together, and plans of a Vegas wedding are in the air. In the end, Carmen tries to seduce Ashley, so Ashley kicks her out. Ashley is now ready to tell Spencer that she does not want her to go to Boston. At Spencer's graduation party, her movie is shown, and she agrees to move in with Ashley at the loft.