“American Country Countdown’s Top 10 Stories” (8 p.m., Fox): This special recalls

“American Country Countdown’s Top 10 Stories” (8 p.m., Fox): This special recalls the year’s most talked-about moments in country music. Included: performances by Carrie Underwood, Jason Aldean, Little Big Town and others.

“Luther” (9 p.m., BBC America): Idris Elba reprises his role as a relentlessly grim British cop in a special two-hour edition of “Luther.” And now he has a new baddie to deal with – a cannibalistic serial killer.

“Barbara Walters 10 Most Fascinating People of 2015” (9:30 P.M.): Our host once again looks back at some of the year’s top headliners. The list includes Bradley Cooper, Amy Schumer, Tracy Morgan, Ronda Rousey, Bernie Sanders and Misty Copeland.

TV listings, B6