Preparing for the East Catholic Valentine's Day dance, Meg tries to convince boyfriend Luke of the importance of the holiday, while Roxanne waits for a brave boy to ask her to the dance. Meanwhile, Jack, prompted by his doctor, seeks a second opinion regarding his lingering sickness, while JJ searches for forgiveness from Beth. Elsewhere, Patty braces for her own Valentine's Day festivities as she makes arrangements for her first coed party.

In the midst of a special memory lane ""Bandstand,"" Meg (Brittany Snow) copes with a hostile Bobby Darin (guest star Duncan Sheik) while attempting to help roving columnist Roxanne (Vanessa Lengies) land an interview with the hit singer. In the midst of the chaos, Jimmy Riley (guest star Jesse Hutch ) surprises his dance partner when he shares the big news that he joined the marines. Elsewhere, Jack (Tom Verica), Henry (Jonathan Adams), Nathan (guest star Keith Robinson ) and Pete (guest star Matthew John Armstrong ) spend a rainy day playing an allegedly friendly game of poker. Helen (Gail O'Grady) receives a friendly ride home from her professor (guest star Robby Benson ) while JJ (Will Estes) spends a rainy afternoon drowning his sorrows in beer. Country music sensation LeAnn Rimes guest stars as Connie Francis singing ""Where the Boys Are"" on ""American Bandstand"" and Duncan Sheik portrays Bobby Darin singing ""Beyond the Sea."" Sarah Ramos and Ethan Dampf also star..

JJ's senior prom is coming up but he's not going because Colleen has made him another offer. Then he hears from Beth. In other prom-related doings, Meg's new friend Carol invites her---but not Roxanne---to a pre-prom sleep-over at her house. Meanwhile, Patty's afraid that no one likes her (there's some reason for this: she has a reputation as being a ""know-it-all""); Natha puts Henry in another delicate situation at the Girard Avenue store; and Jack runs into Professor Witt near the store and senses that there might be something between him and Helen.