Katherine Heigl Katherine Heigl

Nearly five years after her contentious exit from ABC's Grey's Anatomy, Katherine Heigl is returning to television for what she calls an extraordinary series: NBC's new political drama State of Affairs.

"Why now? This project is an extraordinary opportunity for me," Heigl tells us in the video interview below. "I made a difficult decision [to leave Grey's], but it was the right decision for me at the time. I really just wanted to spend more time with my family and my new baby and extend my family and I'm really grateful to have been able to do that and I'm very grateful for these last couple of years."

Katherine Heigl: I quit Grey's because "my priorities were messed up"

On the upcoming series, which premieres Monday at 10/9c, Heigl stars as top CIA analyst Charleston "Charlie" Tucker. But combating terrorism and managing international crises isn't just her job. When Charlie's fiancé — also the son of the president (Alfre Woodard) — is killed during an attack, it becomes her life's mission to avenge his death and solve his murder.

Does Katherine Heigl regret leaving Grey's Anatomy?

"What we have is ... two women who are powerful and are not afraid of each other's power," Woodard says. "You don't want to be in the way of two women who need to avenge something."

 Watch the video below for more from Heigl and Woodard:

Katherine Heigl shares why she returned to TV for State of Affairs

State of Affairs premieres on Monday at 10/9c on NBC.