Tuesday’s highlights on TV include:
They’ve busted out their best moves and strutted their stuff on the 19th season of “Dancing With the Stars.” Now it’s time to watch the winners waltz off with that hideous disco-ball trophy. 8 p.m., ABC.
In the season finale of “Finding Your Roots With Henry Louis Gates Jr.,” Jessica Alba learns that she is descended from a — stunningly attractive, no doubt — cartographer for France’s King Louis XIV. 8 p.m., PBS.
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