A sunset boat ride in Florida leads to death for a vacationing woman and her two daughters, and police investigate a Texas man whose three wives all died in mysterious fashions.

Included: Los Angeles detectives solve a 46-year-old murder case; and DNA leads to a suspected killer who has a twin brother. Host: Bill Kurtis.

Included: the case of Douglas J. Wright, a former state trooper whose 1993 murder of his wife brought a conviction in 2003. Also: the murder of a Navy seaman. Host: Bill Kurtis.

The search for a killer with a distinctive tattoo is recalled. Host: Bill Kurtis.

Included: the 1988 murder of actress Myra Davis, Janet Leigh's stand-in for “Psycho,” brings a conviction in 2001. Also: a phone tip helps solve a cold case.

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The case of serial killer and rapist Arohn Kee is recalled. Host: Bill Kurtis.

Police play a wild hunch that pays off in the capture of a serial rapist. And after 26 years, investigators finally solve the murder of a 6-year-old girl who had been forced to take a cold-water bath as punishment for painting her nails with pink polish without permission.

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Included: the 1998 murder of waitress Corey Parker in Jacksonville Beach, Fla., by Robert Erik Denney. Host: Bill Kurtis.

A detective in California tracks down a prostitute's killer with the help of a key piece of evidence--fingerprints lifted off two beer bottles found at the murder scene. And two persistent cold case detectives in Kansas City, Mo., use DNA analyses to investigate the 1990 murder of a woman and the death of a man killed in a car crash in 1988.

The Chicago Police Department launches the Women's DNA initiative to fund the testing of backlogged rape evidence kits and help rape victims find justice. Meanwhile in Sacramento County, California, the deputy district attorney hunts for the killer of a man who was brutally stabbed to death in his home 16 years earlier, using a new grant for DNA testing.

Nine years after police had to release the teenage suspect in a woman's murder due to lack of evidence, they find a new lead in the case. Twenty years after a young woman is murdered while babysitting her nephew, police are able to find DNA evidence that points to her killer.

Police in Albany, N.Y., get a surprise when a killer they think targets only older women is suspected in the murder of an elderly man. And the contents of a secret storage shed holds the grisly clues to a murder that has gone cold for more than 14 years.

After 19 years, Kansas detectives reopen the case of a banker found beaten to death in his bed--and the chief suspect is his cheating wife. And a man with a guilty conscience helps Arkansas police to crack a cold case of murder when he tells them that his ex-wife knows who the killer is.

Nine years after the murders of a mother and her teenage daughters, a wiretapped conversation between the suspected killer and his sister helps police to crack the case. And the baffling murder of a Virginia woman is solved when human bones are discovered by a geologist working in North Carolina.

In Rhode Island, policewomen go undercover in as street walkers to nab the man suspected of murdering three prostitutes. And a dagger-shaped letter opener is the key piece of evidence that links a priest to the grisly 1980 murder of a nun in Toledo, Ohio.

On a summer night in 1987 a mother worries and waits for her 19-year-old daughter to come home. But Diana never comes home and she's found raped and strangled near the Hudson River. Investigators suspect her friend, Michael because his alibi is shaky and witnesses place his truck near the crime scene. Trouble is, he passes a polygraph and his DNA is no match. Nevertheless, Michael remains the chief suspect for 17 years, until DNA fingers another man who offers a chilling story of Diana's last breath. Then, a young family's life is shattered when a San Antonio interior design shop becomes a crime scene. In 1983, a young mother is raped and murdered at work. The crime remains unsolved for two decades. Then in 2003 detectives reopen the case pegging their hopes on DNA. But when the evidence turns up missing, detectives worry this case could be over before it starts.