Mariah Bonner

While investigating a woman's death, Sara and Langston turn to a friend of Grissom's for help; after a teenager appears to have committed suicide, Nick and Dr. Robbins save her unborn baby.

Walter and Sylvester enter an international chess competition undercover on foreign soil in an effort to extricate a US spy before her identity is exposed.

With the prostitution task force closing in, Riley (Jennifer Love Hewitt) struggles to shield her family from a vengeful competitor and protect her employees and customers from being arrested.