High School Homicide: In 1989, Indianapolis high school student Amy Weidner was brutally killed while she stayed home from school. But who would want her dead? (S6, ep 5)

Burning Fury: In 1988, Robert Haugen was found murdered in his apartment. Two decades later, a surprising culprit with a sadistic dark side is brought to justice. (S5, ep 5)

Mother's Day Murders: When a military wife and her two girls are found dead, police uncover many suspects, including a babysitter and an eyewitness who can't be trusted. (S5, ep 5)

Monstrous Act: A look at the surprising twists in the hunt for the killer of 20-year-old Missy Grubaugh, who was found dead in her apartment in Arlington in 1994. (S3, ep 5)

Series exploring some of the most baffling and challenging investigations in modern law enforcement. (S8, ep 4)

Too Close To Call: Just one or two fish is all that separates the top four boats as the crews enter the final five days of the Atlantic bluefin tuna season. (S4, ep 17)

Bait And Switch: Hard Merchandise hold the lead as the final week begins. But with a single tuna worth up to $20,000, the fight for first place will go down to the wire. (S4, ep 15)

The Reckoning: With just one week left, the Gloucester fleet gets set for a final showdown as the North Atlantic bluefin fishing season draws to a dramatic close. (S3, ep 15)

Knock Out Punch: With just two weeks remaining, the Gloucester crews are locked in a tight race. It's clear that none of the teams are prepared to go down without a fight. (S4, ep 14)

The Mighty Bite: With just two weeks of the fishing season left, the contest heats up as the Gloucester captains race to bring in record hauls. (S3, ep 14)