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What to Watch on Tuesday: ‘Shadowhunters’ series targets demons

Katherine McNamara and Dominic Sherwood in ABC Family’s “Shadowhunters.”
Katherine McNamara and Dominic Sherwood in ABC Family’s “Shadowhunters.” ABC Family

Shadowhunters (9 p.m., ABC Family) – In this new series, a young woman learns on her birthday that she comes from a long line of human-angel hybrids who hunt demons.

Also on tonight . . .

Finding Your Roots (8 p.m., UNC-TV) – Henry Louis Gates Jr. helps Soledad O’Brien, Bill O’Reilly and Bill Maher trace their Irish ancestry. Several news outlets have already reported that the show finds a familial link between Maher and O’Reilly.

State of the Union (9 p.m.) - This happens on all the major broadcast and news networks.

Killing Fields (10 p.m., Discovery) – In the second episode of this new true crime series, which follows an active homicide investigation in Louisiana in real time, DNA results shift detectives’ focus.

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