1. Cemented in Fear

After a young Ohio man vanishes without a trace, detectives embark on an investigation involving a love triangle, drugs, and murder.

3. Graveyard Shift

After police find a murder victim inside a Civil War crypt in a historic cemetery in Southwest Philadelphia, detectives from two counties navigate the evils of a notorious motorcycle club to try and solve the case.

4. A Barrel of Burnt Bones

Pennsylvania State Troopers are tasked with a haunting murder investigation that takes more than a decade to solve after finding charred and decomposed human remains in the Poconos.

5. A Neighborhood of Monsters

The disappearance of a 17-year-old girl leads detectives to an investigation spanning two decades; the case soon goes cold, but gets a renewed push after three women escape Ariel Castro's Cleveland house of horrors.

6. Needles in a Mineshaft

When a young couple goes missing in Eureka, Utah, detectives from neighbouring counties work together to track down their killer and, with the help of a highly trained dive team, recover their bodies in an abandoned mineshaft.