By Natalie Abrams
October 09, 2014 at 04:00 PM EDT
Jennifer Graylock/Getty Images

Victor Garber has landed a recurring role on The Flash, EW has learned.

The Alias alum will play Dr. Martin Stein, one-half of the Firestorm entity from DC Comics. Dr. Stein is a brilliant but arrogant nuclear physicist who has sacrificed everything, including a marriage, for his work in transmutation. After he discovers the particle accelerator fused him with the younger, more impulsive Ronnie Raymond (Robbie Amell), he races to find a way to separate the two before it’s too late.

Though Amell will first appear in the third episode of the season as Ronnie Raymond, who is also the fiance of Caitlin Snow (Danielle Panabaker), Garber won’t appear until the 12th episode.

The six-time Emmy nominee’s other TV credits include Web Therapy, Power, The Big C, Damages, and Eli Stone.

The Flash airs Tuesdays at 8 p.m. ET on The CW.