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Cases undertaken by the Federal Bureau of Investigation are examined.
Season 4, Episode 10
May 27, 2013
A serial rapist attacks women in the Denver area.
Season 4, Episode 9
May 20, 2013
A search for a missing police dispatcher is chronicled.
Season 4, Episode 8
May 13, 2013
A case involving a teenage girl who was kidnapped by a drug gang is examined.
Season 4, Episode 7
April 29, 2013
An investigation of a serial killer leads the FBI to an unsolved murder in the Bronx.
Season 4, Episode 6
April 22, 2013
Three murders in Jacksonville spark a worldwide manhunt for the killer.
Season 4, Episode 5
April 15, 2013
Two young girls from a small California town go missing, and police suspect a serial predator.
Season 4, Episode 4
April 8, 2013
A 1993 murder in Chicago is recalled.
Season 4, Episode 3
April 1, 2013
Documenting a search for a missing 9-year-old girl.
Season 4, Episode 2
March 25, 2013
A serial killer is sought in St. Louis.
Season 4, Episode 1
March 18, 2013
The fourth season opens with a race to rescue an 11-year-old girl from the clutches of a sex predator.
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