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

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.

This story was originally published January 12, 2016 at 1:00 AM with the headline "What to Watch on Tuesday: ‘Shadowhunters’ series targets demons."