In 2008, two-year-old toddler, Caylee Anthony, vanishes. Her mother, Casey Anthony, tells investigators Caylee has been kidnapped by her nanny, a woman Anthony's family has never actually seen. Why was Anthony lying? And where was Caylee? This extraordinary two-part episode follows the twists and turns of this bizarre case, and unbelievable trial.

In the mid-1970s, hundreds of people began disappearing without a trace. Families were left wondering about their loved ones for decades. But in 1997, shocking news about a mysterious religious group made headlines around the world and some answers finally came to light. This episode follows the story of Heaven's Gate.