The CW has cast Stephanie Corneliussen as Valentina Vostok in multiple episodes of Legends of Tomorrow, TV Line reports. Corneliussen is hot off a breakout role in the first season of USA’s Mr. Robot.

In the DC Comics universe, Volstok was a member of the Doom Patrol as Negative Woman, before becoming the White Queen of espionage agency Checkmate.

The Legends of Tomorrow description says the character is “a gifted and beautiful Soviet physicist who will stop at nothing to defend her precious ‘Motherland.’” The time travelling Legends team will encounter Volstok during the height of the Cold War, and expect that she’s working for immortal supervillain Vandal Savage (Casper Crump) to develop a secret weapon. In order to stop her, the Atom (Brandon Routh) and Captain Cold (Wentworth Miller) both try to win the Volstok’s heart.

Legends of Tomorrow is slated for a midseason premiere on The CW.