The other night brought word that CBS’ forthcoming Supergirl series might potentially feature the Man of Steel in an able-bodied cameo, but who’s ready for some actual names and faces? Not Another Teen Movie star Chyler Leigh has nabbed the role of Kara’s sister “Alex,” while Homeland alum David Harewood may one day gear up as Cyborg Superman.

Leigh will take the role of Alexandra “Alex” Danvers, adoptive sister to Kara (Glee star Melissa Benoist), whose fascination with her sibling’s abilities inspires Alex to become a doctor. Of course, we can’t help remembering that Superman himself shares a tense history with those looking to study his powers, while “Alex” sounds surprising close to a certain Luthor, no? Hmm …

Additionally, Harewood will play former CIA agent Hank Henshaw, who now runs the Department of Extra-Normal Operations, tracking extraterrestrial threats on the planet. Comics famously portrayed the character as a “Cyborg Superman” figure following the “Death of Superman” arc, though CBS’ incarnation seems to be playing it slow, at least for the moment.

Most recently adding Calista Flockhart as Cat Grant, Laura Benanti as Kryptonian mother Alura and True Blood star Mehcad Brooks as an older rendition of Jimmy Olsen, here’s how CBS formally describes the new series:

Based on the DC Comics character, the drama tells the story of Kara Zor-El, who was born on the planet Krypton, but escaped amid its destruction years ago. Since arriving on Earth, she’s been hiding the powers she shares with her famous cousin Superman. But now, at age 24, she decides to embrace her superhuman abilities and be the hero she was always meant to be.

CBS’ Supergirl is also looking to cast from Superman lore CatCo programmer (and Kara-crushing future Toyman) Winslow Schott, as well as the villainous Lumberjack and Kara’s adopted family the Danvers. Arrow producer Greg Berlanti and No Ordinary Family’s Ali Adler will write the script and executive produce, now joined by CW superhero producer Andrew Kreisberg.

As with DC’s approach to movies and TV thus far, the new Supergirl series will establish its own independent continuity, outside of Arrow and The Flash, or the inevitable Justice League movie, as CBS boss Nina Tassler previously downplayed the possibility of any CW crossover.

CBS’ Supergirl still lacks a formal series order, but who else might join the new super-procedural, likely to hit screens this fall?

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