On tonight's "Supergirl," fans of the CW series will get to meet the President of the United States as played by comic book icon Lynda Carter. The episode, titled "Welcome to Earth," will see Carter's POTUS come under attack -- and a new scene posted to the show's Twitter page shows exactly that.

The new scene depicts the arrival of the President and sees her come under fiery attack by a mysterious assailant. Fortunately for the Commander-in-Chief, Supergirl (Melissa Benoist) is present and able to save the day. But a bunch of Secret Service agents? They aren't so lucky.

Lynda Carter's debut on "Supergirl" tonight comes after months and months of anticipation. Executive producers Greg Berlanti and Andrew Kreisberg first discussed their dream role for Lynda Carter (who played Wonder Woman in the hero's '70s live-action TV show) way back in March, targeting her as their ideal president. This past summer, Carter was confirmed to have a role in the series -- as the President of the United States. Now tonight sees her make her big debut. Who says dreams don't come true?

Since then, we've seen images of Carter's POTUS as well as heard about the actor's presidential inspiration and seen her in action in a clip. Carter's big debut comes in tonight's episode, titled "Welcome To Earth." You can read the episode's synopsis below:

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An attack is made on the President (guest star Lynda Carter) as hot-button, alien vs. human rights issues heat up in National City. Supergirl (Melissa Benoist) and the DEO are assigned to protect the President and bring in the responsible party. Alex (Chyler Leigh) teams up with Detective Maggie Sawyer (Floriana Lima) to investigate the case while Kara searches for a recently escaped Mon-El (Chris Wood), who she fears may be the alien behind the assault.

Starring Melissa Benoist as the Girl of Steel, "Supergirl" airs Mondays at 8 pm ET/PT on The CW. The series also stars David Harewood as Martian Manhunter, Mehcad Brooks as Jimmy Olsen, Chyler Leigh as Alex Danvers and Jeremy Jordan as Winn Schott and features appearances by Calista Flockhart's Cat Grant, Ian Gomez's Snapper Carr as well as Tyler Hoechlin's Superman.