Take a look behind the scenes of the Federal Bureau of Investigation's crime laboratory.
In the spring of 1997, a killer who preyed on senior citizens terrorised the sleepy town of River Parish, Louisiana. S6, Ep11
A series of bank robberies in Texas leave authorities baffled. When similar heists begin the next year in California, FBI agents link the crimes. S6, Ep12
Two masked robbers armed with semi-automatic weapons robbed armoured car couriers of $350,000 in the MGM Grand Hotel and Casino in Las Vegas. S6, Ep13
In 1997 two burglars broke into a home and shot at a police officer. One year later clues to the location of the suspects are revealed. S6, Ep14
The bureau investigates the activities of a Croatian terrorist group who gunned down some of their opponents and eliminated others with parcel bombs. S6, Ep16
In 1994 a rash of masked robberies plagued the Detroit area. When one homeowner shot back, the identity of the intruders was revealed. S6, Ep17
In the late 1970s, the FBI had knowledge of anti-Castro terrorists operating in the US. Then, a new group appeared, more violent than their predecessors. S7, Ep1