When Sam's twin sister Melanie comes for a visit, you know it is going to be double fun. The viewers are kept guessing if this "twin" is not one of Sam's pranks, but it is Freddie who is the real victim. He doesn't believe Sam has a twin sister and does everything to prove he is right. He asks Melanie for a date, gets kissed by her, and almost goes crazy. Will he find out the truth?