CW | 8:00 pm

James Olsen (Mehcad Brooks) assumes his new, super-powered guise when a parasite alien renders Supergirl (Melissa Benoist) helpless to protect National City in "Changing." That title applies to a couple of other characters as well: Mon-El (Chris Wood), whose job prospect may prompt him to act against his better instincts; and Alex (Chyler Leigh), who has new aspects of her life to deal with. Jeremy Jordan also stars.