Part 1 Roots: The Saga of An American Family - S1-E1
Other mistake: During the voyage aboard the Lord Ligonier, none of the African captives have shaved nor had haircuts during the long voyage across the sea, but they are clean-shaven and their hair the same length when they berth in Annapolis as when they were first loaded aboard ship in Africa.
Part 1 Roots: The Saga of An American Family - S1-E1
Other mistake: Where is the light in Kunte/Toby's slave cabin coming from? There are no candles or lantern, and electricity hadn't been invented yet. Obviously studio lighting.