8The Third Rail delves into the ongoing challenge of race relations in the city of Boston. Like its predecessors, Code Black and Troubled Waters, this latest tale proves that all is not what it appears to be when the city's most conniving power brokers try to get their way. Veteran transit police sergeant Morris Fitzgerald must step carefully in trying to identify a rogue cop while also cracking the mysterious disappearance of transportation artifacts. All the while, he must keep the simmering tensions among the city's many factions from reaching a boiling point.