500 Questions The tough trivia challenge hosted by “Nightline’s” Dan Harris continues. 8 p.m. ABC
9-1-1 Encounters This new series features true stories of emergency calls involving animals. 8 and 8:30 p.m. Animal Planet
Lost in the West Stepbrothers (Caleb Thomas, Niko Guardado) have a rootin’-tootin’ time when they're transported from the present day to the 1880s in this new three-part comedy-western mash-up. 8 p.m. Nickelodeon; also Sun.-Mon.
Instant Jam Country-music star Dierks Bentley performs new songs and old...