Co-created by Greg Berlanti (Arrow, The Flash) and Ali Adler (No Ordinary Family), Supergirl season 1 premiered on CBS last year. Then, after plenty of speculation as to whether it would be connected to Berlanti's DC Comics series on The CW, Barry Allen (Grant Gustin) traveled to Kara Danvers' (Melissa Benoist) home city by way of the multiverse confirming the characters could coexist. After season 1 concluded, it was unclear if the show would continue on CBS - that is, until the announcement that Supergirl would be moving to The CW for second season in Fall 2016.
As production on Supergirl's sophomore outing gears up ahead of the show's October premiere date, we've received plenty of casting news about the show, including Tyler Hoechlin joining as Clark Kent a.k.a. Superman and a handful of other new characters. Now, we know a former TV superhero will also be joining the show in a presidential role.
THR is reporting that Lynda Carter, who may be most well known for her starring role in the 1970s television series Wonder Woman as the titular superhero, has joined Supergirl season 2 in the recurring role of the United States President. She will first appear in the third episode of season 2, and is set to return for multiple episodes.
Earlier this year, Berlanti and Supergirl executive producer Andrew Kreisberg revealed that they already had Carter in mind to play the U.S. President on the show during season 1, but scheduling problems prevented it from happening. They did say at that time, "We’re going to do it, we’ll just do it next year." So, it appears Berlanti and Kreisberg followed through on that statement and secured Carter for the recurring role in season 2.
Little is known about the role of Supergirl's U.S. president at this time (even her name), but since production on season 2 is likely to begin soon, we may learn more in the coming weeks - perhaps at Comic-Con International in San Diego next month. However, it's likely that Carter's character will have something to do with how the government's DEO agency operates in season 2. Last we saw, season 1 ended with Lucy Lane (Jenna Dewan Tatum) taking over when it was discovered that J'onn J'onzz (David Harewood) was impersonating Hank Henshaw.
That being said, it's unclear at this time just how much Supergirl's move to The CW will affect the show between its first and second seasons. Although the series has added a number of new cast members, including Carter's presidential role, it has yet to be announced whether Calista Flockhart will be reprising her role as Kara's mentor Cat Grant. So, with the shifting networks and the new superheroes joining the series, it's difficult to say how Carter will fit into season 2 of Supergirl - though fans of DC Comics superheroes are sure to get a kick out of seeing TV's Wonder Woman and Supergirl share the screen.
The Flash season 3 will premiere Tuesday October 4th at 8pm on The CW, Arrow season 5 will premiere in the same timeslot on Wednesday October 5th, Legends of Tomorrow season 2 on Thursday October 13th, and Supergirl season 2 on Monday October 17th.