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  • "The African Americans: Many Rivers to Cross" (8 p.m., PBS): In this documentary series, Harvard scholar Henry Louis Gates chronicles the history of black America, beginning with the 16th century. 8 p.m., PBS.

  • "Ravenswood" (9:02 p.m., ABC Family): A creepy spin off "Pretty Little Liars" that has Caleb (Tyler Blackburn) learning about a deadly curse linked to Ravenswood's bizarre history. It airs immediately after the show that spawned it.

  • "Chasing Nashville" (10 p.m., Lifetime): This new reality series follows four teens from Appalachia as they pursue their dreams of becoming country music stars. The opener takes us to the annual Hillbilly Days singing competition. Also Tuesday:

  • "The Originals" (8 p.m., The CW)

  • "Marvel's Agents of S.H.I.E.L.D." (8 p.m., ABC)

  • "NCIS" (8 p.m., ABC)

  • "Brooklyn Nine-Nine" (8:30 p.m., Fox)

  • "Supernatural" (9 p.m., The CW)

  • "New Girl" (9 p.m., Fox)

  • "American Daredevils" (10 p.m., Discovery -- Series premiere)

  • "Chicago Fire" (10 p.m., NBC)

  • "Awkward" (10:30 p.m., MTV -- Midseason premiere)



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