Dancing is not just about moving to the music, the most successful performers know how to truly become a character. For the fifth episode of "Step It Up & Dance," the contestants will show off their acting skills for television star and Tony Award-winning actor, Jason Alexander ("Seinfeld"). Alexander, who is the director of the musical theater company Reprise, is producing "Damn Yankees," and for the fifth challenge of the season, the dancers will have to learn choreography from the Broadway classic. Both Alexander and famed choreographer Lee Martino serve as the guest judges. One dancer will be declared the winner and offered an opportunity to dance with Alexander's Reprise; another dancer will be eliminated.