"The Hunt With John Walsh" (9 p.m., CNN): In this new series, the victims' rights activist exposes stories of ongoing criminal inquiries tied to fugitives. First up is the case of a Northern California man accused of killing his wife and two daughters.
"Masters of Sex" (10 p.m., Showtime): They say that work and sex aren't supposed to mix, but in Season 2 of this sizzling drama, research pioneers Bill Masters (Michael Sheen) and Virginia Johnson (Lizzy Caplan) take their mostly academic partnership out of the lab and into the bedroom. Naturally, things heat up in a hurry. Oh, boy. What's going to happen when Libby (Caitlin FitzGerald) finds out?
"The Strain" (10 p.m., FX): This is the latest, and possibly scariest, creep show to hit prime time. Based on the book trilogy by director Guillermo del Toro and author Chuck Hogan, it finds New York plagued by an outbreak of vampirism that, of course, threatens all of humanity.
Also on Sunday: