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Dr. Michael Swango takes an oath to do no harm, but does just the opposite; suspicious illnesses and deaths follow the once-trusted physician-turned-killer from hospital to hospital for nearly two decades and across two continents.

Very Scary People

Dr. Death: You're Next (Part 2)

For nearly two decades, physician-turned-murderer Michael Swango leaves a trail of death and mayhem across two continents.

Dr. Death: A License to Kill (Part 1)

Six weeks after jumping bail in Galveston, Texas, Robert Durst is caught on a store security camera in Pennsylvania shoplifting a sandwich and is quickly sent back to Galveston to stand trial for the murder of his neighbor, Morris Black.

Robert Durst: Nobody Tells the Whole Truth (Part 2)

The story of the millionaire heir to a vast real estate fortune who has been linked to the deaths of his wife, his best friend, and his neighbor.

Robert Durst: World's Worst Fugitive (Part 1)

In April 1973, Edmund Kemper, 24, murders six coeds in and around the city of Santa Cruz, Calif., shaking the community to its core.

The Co-Ed Killer: Thinking Murder All Day Long (Part 2)

Desperate for answers community members live in terror waiting for the man dubbed the Co-Ed Killer to strike again.

The Co-Ed Killer: The Murder Capital of the World (Part 1)

A tip from a teenage boy leads to the identity of the Night Stalker and twenty-four hours later a mob of angry citizens track him down and capture him.

The Night Stalker: I Will Be Avenged (Part 2)

The summer of 1985 was one of the hottest Los Angeles had seen in a century. But terrified residents weren't sleeping with the windows open; a killer known as the "Night Stalker" was on the loose.

The Night Stalker: Summer of Terror (Part 1)

For years the BTK killer plays a cat and mouse game with law enforcement and the media taunting them as he seeks the attention he craves.

BTK: The Taunting (Part 2)

He calls himself "B.T.K." which stands for "Bind, Torture, Kill" and for decades this bloodthirsty serial killer terrifies Wichita as he murders again.

BTK: Bind, Torture, Kill (Part 1)

In 1977, the city of New York is stalked by a seemingly faceless serial killer known as "Son of Sam"; after his final shooting takes him to Brooklyn, a twist of fate and a little luck leads to his capture.

Son of Sam: I Am a Monster (Part 2)

From 1976 to 1977, David Berkowitz terrorizes New York City under his creepy self-given moniker: the "Son of Sam"; he is among the most infamous serial killers in American history.

Son of Sam: The Duke of Death (Part 1)

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Host Donnie Wahlberg chronicles the twisted lives of diabolical criminals, such as Charles Manson, Aileen Wuornos, John Wayne Gacy, the Rev. Jim Jones, and others.

S2 E11 | Dr. Death: A License to Kill (Part 1)