Seven women are brutally stabbed and dumped in the woods of the Connecticut River Valley. Phelps seeks answers from a woman who survived the serial killer's attack and may be able to identify a new person of interest in the case.

Phelps heads to Atlantic City to investigate the 2006 murder of four sex workers to see if they are connected to a breaking case on Long Island.

Phelps and Kelly go on a wild ride as they investigate the abduction and murder of four children in the Detroit suburbs.

Between 2003 and 2007, five down-and-out women go missing in Worcester Massachusetts. Their remains found in wooded areas outside the city. Phelps tracks the hunter, following the trail of evidence.

From 1971 to 1973, three little girls were snatched up, violated and murdered. Phelps travels to Rochester, New York, to search for answers in a town that won't let go.

Phelps travels to the Deep South to investigate the murder of eight young women. But a maverick private investigator, multiple persons of interest and rumors of police corruption make the case murkier than a Louisiana bayou.

Fiver senior citizens are brutally murdered between 1996 and 1998 in Columbus, Mississippi. Local law enforcement and a secret source have Phelps and Kelly wondering if they're looking at serial killer.

Phelps and Kelly investigate the 1982 murder of a New Jersey woman. Phelps is convinced he's got his man, but can he make the convict confess?