Laura Vandervoort, the actress who played Kara Zor-El in Smallville, will appear in an upcoming episode of Supergirl as the villain Indigo, producers revealed today at the Television Critics Association.

The character will appear in the fifteenth episode of the show's first season, which will follow on the heels of what are expected to be two anticipated episodes.

Indigo is described by producers as "a living, strong-willed supercomputer that was sentenced to Fort Rozz after turning against the people of Krypton. Now on Earth, Indigo will let nothing stand in her way."

When series star Melissa Benoist was first cast, there was a bit of consternation online, but Vandervoort was an early voice of support for her successor.