Born a slave, Harriett Tubman became a famous "conductor" on the Underground Railroad, leading hundreds of slaves to freedom.

John Brown's failed attempt to loot the armory at Harper's Ferry sparks the beginning of abolition.

Lincoln develops and enacts a permanent plan to abolish slavery, in this clip from Season 1, "Saving the Union."

Life aboard the ship was agonizing and dangerous; nearly 2 million enslaved Africans would perish on their journey across the Atlantic.