A victim of the Salem witch trials curses the town, one woman changes the way people celebrate Halloween, and Vlad the Impaler inspires the novel "Dracula."

Robert E. Lee's estate becomes a burial ground for Union soldiers, counterfeiters try to kidnap Abraham Lincoln's body, and an embalmed bandit makes his way around the U.S.

Joan of Arc leads France to victory, Temujin rises to power in Mongolia, and uber-rich emperor Mansa Musa takes his entourage to Mecca.

A lawyer defends the lives of rats in court, Henry Bergh establishes the ASPCA, and horse learns to solve math problems.

An Italian handyman steals the "Mona Lisa," the "Santa bandits" rob a bank in Texas, and Mossad agents capture a Nazi general in Argentina

The Ghost Army helps defeat the Nazis in Operation Plunder, Frank Emi unifies Japanese Americans at internment camps, and Hitler's nephew fights for the U.S.

Mystery writer Agatha Christie vanishes, a man known as D.B. Cooper successfully hijacks a plane, and a series of anonymous letters haunts the town of Circleville, Ohio.

Fred Rogers fights for public television in front of Congress, journalist Ida Tarbell takes on John D. Rockefeller, and Maya Lin designs the Vietnam Veterans Memorial.

British suffragettes learn jiu-jitsu, Gwendolyn Sanders ignites the Birmingham Crusade, and Judy Heumann leads a sit-in for people with disabilities.

A salute to Margaret Sanger's crusade for accessible birth control; the creation of the Kinsey scale; Gloria Steinem's undercover work at The Playboy Club.

Questlove, Method Man, Raven-Symone and more celebrate the early history of hip hop, the man known for inventing Motown, Berry Gordy, and "Star Trek" actress Nichelle Nichols's incredible activism on and off the TV screen.

Taran Killam, Jerry O'Connell and Bob Odenkirk explore the lives of Jack Parsons, occultist cofounder of the Jet Propulsion Lab; W.C. Minor, the man who helped write the Oxford English Dictionary; and Rasputin, adviser to Tsar Nicholas II.

Tiffany Haddish, Evan Rachel Wood, Busy Philipps and Mandy Moore pay tribute to the first woman to fight in the Revolutionary War and receive a pension, a museum curator who saved art from the Nazis and Civil War hero Clara Barton.