Monday's TV highlights: 'Supergirl,' 'Scorpion' and more

Kevin Can Wait “The Karate Kid’s” Ralph Macchio reprises his guest role on a new episode of the Kevin James sitcom. 8 p.m. CBS

Supergirl “Roseanne’s” Laurie Metcalf guest stars as Winn’s (Jeremy Jordan) estranged mother on a new episode of the superhero drama. 8 p.m. KTLA

iZombie Liv (Rose...