In the season finale, racial tensions begin to flare in North Philly sparking a massive riot, while an oblivious Meg (Brittany Snow) makes final preparations for her sweet sixteen birthday party. Unaware of the violent situation building around her, Meg attempts to save her friendship with Sam (Arlen Escarpeta), visiting him at the new store, and finds herself in the middle of the urban chaos. Elsewhere, an angry Nathan (guest star Keith Robinson) who helped incite the violence, urges the enraged rioters forward, while Pete (guest star Matthew John Armstrong) and the rest of Philadelphia's finest race to quell the disturbance. Meanwhile, a defeated JJ (Will Estes) returns from Lehigh after being kicked off the football team and makes a surprising announcement to Jack (Tom Verica) and Helen (Gail O'Grady) about his future, while Michael Brooks (Joe Lawrence) reveals the possibility he might be leaving ""Bandstand"" for a new record-producing gig in California. R&B sensation Kelly Rowland

Meg is upset with Roxanne after finding out that Luke and her have been dating secretly. Uncle Pete gets cold feet as his wedding approaches and does not attend his wedding. JJ is surprised to see a friend of his from basic training in the untouchables. Later in the episode he is killed. Meg is offered the chance of a lifetime by Colin. Meg and Jimmy Reily reunite during a magazing interview. Sam and Angela don't like Henry's new lady friend.