In the official description for "Supergirl" season one episode five, both Livewire (Brit Morgan) and Helen Slater's Dr. Eliza Danvers arrive in National City. Additionally, two new photos tease Cat Grant and Kara Danvers' shock when CatCo-employee-turned-super-villain Livewire targets them.

Kara's Thanksgiving may be ruined when she suspects her foster mother, Dr. Danvers (Helen Slater), who is coming to town, disapproves of her new role as a superhero. Also, when an accident transforms a volatile CatCo employee into the villainous Livewire, she targets Cat and Supergirl, on SUPERGIRL, Monday, Nov. 23 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Brit Morgan guest stars as Leslie Willis/Livewire and Helen Slater guest stars as Dr. Eliza Danvers, Kara's foster mother.

"Supergirl" airs Mondays at 8 pm EST on CBS. Developed by producers Greg Berlanti, Ali Adler and Andrew Kreisberg, the series stars Melissa Benoist, Calista Flockhart, David Harewood and Chyler Leigh.