George Washington crosses the Delaware, Charles Dickens publishes "A Christmas Carol," and Teddy Roosevelt's children bring Christmas trees back to the White House.

DJ Steve Dahl sparks an anti-disco riot; the Cherry Sisters emerge as the worst vaudeville act of all time; a rivalry between two actors turns violent.

Lin-Manuel Miranda (``Hamilton'') tells the story of Alexander Hamilton, his nemesis Aaron Burr and their infamous duel to the death.

Mayor La Guardia fights the mob over artichokes; Julia Child meets the love of her life while working as a spy; a molasses flood devastates Boston.

Emily Roebling oversees construction of the Brooklyn Bridge; con-man Victor Lustig sells the Eiffel Tower; Shakespeare steals the Globe Theatre.

Stories about presidents and elections, including Abraham Lincoln's law career and the campaign between John Adams and Thomas Jefferson, are recalled.

Katharine Wright helps her brothers build an airplane; the Kopp sisters fight to protect their home; the Fox sisters stoke the spiritualism craze.

Charles Ponzi hires a publicist to improve his image; Sadie the Goat becomes a notorious Hudson River pirate; a con man poses as a Scottish royal.

Teddy Roosevelt revolutionizes football; Winston Churchill pays FDR a visit at Christmastime; Eleanor Roosevelt becomes friends with a female Soviet sniper.

Carry A. Nation vandalizes bars; Andrew Jackson gets involved in a shootout; Marsha P. Johnson stands up for LGBT rights.

Sam Patch becomes America's first daredevil; Marilyn Monroe and Ella Fitzgerald form a lasting friendship; Buster Keaton takes his talents to the big screen.

In the Season 4 premiere, LSD guru Timothy Leary breaks out of prison; a sailor attempts a bold rescue from Devil's Island; and a baker remains calm on the Titanic thanks to his whiskey habit.