Horatio and his crew investigate the deaths of two college students who were in Miami on spring break. The first is a teen girl found dead on a beach with her neck broken and human bite marks on her legs. The second is a young man found on the bottom of a motel swimming pool who apparently died before he hit the water. Carson: Sean Maher. Tiffany: Michelle Morgan. Ted: Adam Kaufman. Marie: Lauren Stamile. Amy: Maggie Grace. Jon: Stephen Mendel. Welch: Troy Winbush. Jack: Riley Smith.