'MacKenzie works closely with Brian Maddern, a psychological profiler, to identify a killer who uses the internet to select his victims. Mac is put undercover as bait but gets frustrated when it appears she has been following false leads. The Unit runs out of time and is ordered to wind up the investigation, when Mac is unexpectedly confronted by the killer.'
Source: Australian Television Information Archive. (Sighted: 11/6/2013)