Supergirl Supergirl (Melissa Benoist) is a wanted woman, and aliens invade National City to try to claim a bounty put on her. Lynda Carter and Hayley Sales guest star in this new episode directed by filmmaker Kevin Smith (“Clerks”). 8 p.m. KTLA
24: Legacy CTU goes under a lockdown after a credible threat is made, while Carter (Corey Hawkins) is caught in a harrowing situation. Jimmy Smits, Miranda Otto, Teddy Sears, Dan Bucatinsky, Anna Diop, Gerald McRaney and Ashley Thomas also star. 8 p.m. Fox
Young & Hungry Gabi and Josh (Emily Osment, Jonathan Sadowski) dog-sit the spoiled-rotten pet of a...