Miami homicide detectives race to solve the slaying of an innocent tourist. Meanwhile in Memphis, a shooting at a school dance leaves a student dead and others seriously injured.
In Memphis, a killer vanishes from inside a sealed gas station after shooting the attendant to death. Meanwhile a nine-year-old Miami girl is killed in a shootout between two men.
Amazing Discoveries: It's the moment of truth for the fellowship of the dig, as the guys are faced with the burning question as to whether they should quit or continue. (S5, ep 16)
Seeing Red: The fellowship battles the shifting tides of Smith's Cove and finds evidence that may support one of Dan Blankenship's early theories. (S5, ep 15)
Steel Trapped: The team hits something in the DMT shaft that may prove to be the last thing standing between it and the answers below. (S5, ep 14)
Unhinged: The plot thickens around the discovery of the lead cross as a new theory points to possible ancient origins. (S5, ep 13)
A Key to the Mystery: A skeleton key and maps from Fred Nolan's archives open a new door in the Laginas' quest. (S5, ep 12)
Moving Targets: Further investigation suggests a link between the mysterious medieval cross and the Knights Templar. (S5, ep 11)
The Signs of a Cross: The team unearths a ship's log detailing the burial of treasure on an island eerily similar to Oak Island. (S5, ep 10)
The French Connection: A research expedition to a French castle reveals new clues, including ancient carvings that could link the Knights Templar to Oak Island. (S5, ep 9)