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  • "Nikita" (9 p.m., The CW): Sadly, we'll soon have to bid goodbye to "Nikita," and one of TV's greatest butt-kickers (Maggie Q). But not before enjoying six final, turbo-charged episodes beginning tonight.

  • "Where Were You? The Day JFK Died" (9 p.m., NBC): Veteran newsman Tom Brokaw presides over this 50th anniversary special, which taps into the memories of journalists, celebrities and regular people as they recount the events of a horrific day in Dallas.

  • "An Adventure in Space and Time" (9 p.m., BBC America): This delightful new movie travels back in time to recall the formative days of days of the sci-fi series "Doctor Who." David Bradley does a great job of playing actor William Hartnell, the first alien Time Lord.

    Nikita -- "Set-Up" -- Image NK403b_0073 -- Pictured (L-R): Maggie Q as Nikita and Aaron Stanford as Birkoff -- Credit: Sven Frenzel/The CW -- ©
    Nikita -- "Set-Up" -- Image NK403b_0073 -- Pictured (L-R): Maggie Q as Nikita and Aaron Stanford as Birkoff -- Credit: Sven Frenzel/The CW -- © 2013 The CW Network. All Rights Reserved ( SVEN FRENZEL )

    Also Friday:

  • "JFK Assassination: The Definitive Guide" (8 p.m., History Channel)

  • "Bones" (8 p.m., Fox)

  • "Shark Tank" (9 p.m., ABC)

  • "Raising Hope" (9 p.m., Fox)

  • "Nashville 2.0: The Rise of Americana" (9 p.m., PBS)

  • "Blue Bloods" (10 p.m., CBS)

  • "Real Time With Bill Maher" (10 p.m., HBO)