Lynda Carter debuts as President Olivia Marsdin in this sneak peek at Monday's episode of "Supergirl."

In the scene, the president tours the DEO, discussing with Hank Henshaw her new vision for the agency in the aftermath of her Alien Amnesty Act. It's a vision the Martian Manhunter doesn't exactly share. "There are aliens out there, killers who wouldn't understand the very concept of the rights you're offering," he says, "evil creatures who could take advantage of your good will."

Carter, who's beloved for her role as Wonder Woman in the 1970s television series, revealed she modeled Marsdin on Hillary Clinton, whom she's known since 1983.

"I know who she is because I’ve seen her in all kinds of situations – I spent quite a bit of time with her during the whole impeachment and [saw] how she handled herself with grace," Carter told USA Today. "When she’s working, she’s got her first-class brain going, and the difference between her and most other politicians is it’s not just her own voice she likes, she listens. That’s what I tried to convey in what an effective president would be: warm and passionate."

RELATED: Miss Martian Debuts in "Supergirl" "Welcome to Earth" Clip

Unfortunately for fans of Carter, she's so far only been cast on Monday's episode, "Welcome to Earth," which features an attack against her character as the debate over alien vs. human rights heats up in National City. Supergirl and the DEO are assigned to protect the president and find the culprit, whom Kara fears may be the recently escaped Mon-El.

Airing Mondays at 8 p.m. ET/PT on The CW, “Supergirl” stars Melissa Benoist, Mehcad Brooks, David Harewood, Chyler Leigh and Jeremy Jordan. In addition to Carter, "Welcome to Earth” also features guest stars Sharon Leal, Floriana Lima and Chris Wood.