Episode 312, "Penitence" Tomorrow 10|9c
SEASON 1, EPISODE 111 - The citizens of a small Long Island town are shocked when 13-year-old Annie Miller disappears on her way to school. Then, 24 hours later, her best friend, Siobhan, is also reported missing. Jack and his squad hope that a series of videotapes made by the pair will help find them. After Annie is found dead, Jack becomes convinced that the girls knew the person who abducted them, and he races to find Siobhan before she suffers the same fate as Annie.