CBS and DC Entertainment have announced two more have joined the cast of their upcoming “Supergirl” series with “Homeland” star David Harewood as Hank Henshaw and Chyler Leigh as Alexandra “Alex” Danvers.

Henshaw, as comic fans know, will go on to become the villain Cyborg Superman, but in the series he is described as “A onetime CIA agent, who now runs the Department of Extra-Normal Operations (DEO), which tracks extraterrestrial threats on the planet Earth.”

Alex will be Kara’s foster sister on the show, described as “fascinated by Kara’s powers from a young age, Alex developed a lifelong obsession with science which inspired her to become a doctor.”

In addition, “Arrow” and “The Flash” executive producer/writer Andrew Kreisberg has signed on to executive produce the series, which will no doubt rekindle the crossover buzz between “Supergirl” and The CW shows.

The two join as cast that includes Melissa Benoist as Kara Zor-El, Mehcad Brooks as James Olsen, Laura Benanti as Kara’s Kryptonian mother Alura Zor-El, and Calista Flockhart as Cat Grant.

Hailing from Warner Bros. TV and Berlanti Productions (who also produce the hit DC Comics series “Arrow” and “The Flash” for The CW), “Supergirl” is based on the characters from DC Comics and centers on Kara Zor-El, who comes to Earth after escaping the destruction of Krypton. After many years hiding her abilities, she joins the ranks of her cousin Superman to become the hero she was meant to be.

The pilot episode was written by Ali Adler (“No Ordinary Family”) and Greg Berlanti (“Arrow,” “The Flash”). They will also executive produce along with Sarah Schechter and Warner Bros. TV. The show has a series commitment at CBS.