Jesse Rath is set to play Brainiac 5 in CW's Supergirl, according to TVLine. Rath's Brianaic 5 will come back in time from the 31st Century (and the Legion of Super-Heroes) to help Supergirl battle Reign (played by Odette Anabelle). This comes just days after news that Blake Ritson was cast as the original Brainiac was cast for Syfy's Krypton.
Rath is best-known for starring roles in CW's No Tomorrow, Syfy's Defiance, and CBC's 18 To Life.
Rath is scheduled to debut in Episode 10, titled "Legion of Super-Heroes." Keep in mind, fellow Legionnaire Mon-El has already appeared in the show, as well as Brainiac 8.