Why did Harriet Tubman risk her freedom and become the only formerly enslaved person to return to the slaveholding south? How did the secret Underground Railroad guide people north to freedom? Why did the entire country suddenly become slave-catching territory in September 1850? What did this mean for those who thought they were safe in the North? 

David Olusoga and Sarah Churchwell explore the famous Underground Railroad. 

Social Producers: Emma Jackson, Harry Balden

Producer: Alice Horrell

Head of History: Dom Johnson

Exec Producer: Tony Pastor

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