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.