The CW's Supergirl continues its second season tonight with the new episode The Last Children of Krypton, airing at 8 PM ET. To get fans ready for this episode, The CW released a poster that comic book collectors will surely recognize. The poster features Melissa Benoist as a seemingly lifeless Supergirl being held by her famous cousin Superman (Tyler Hoechlin). This poster teases an integral scene that will take place during tonight's episode.

The poster is an homage to the iconic comic book Crisis on Infinite Earth's #7, where Superman is seen holding an injured Supergirl. This scene will actually unfold in the episode itself when it airs on The CW later tonight. When we first reported on Superman finally being cast in Supergirl Season 2, it was revealed that the character would be featured in at least the first two episodes of this season, but now we have word from Andrew Kreisberg about the possibility of Superman's return. Here's what he had to say below, teasing in his interview with KryptonSite that Warner Bros. would only allow Superman to show up in these two episodes, but they're working on a way to bring him back.

"We're so happy with what we get to do. I don't mean for that to sound as bad as it does, but we asked if we could have Superman in the first episode, and DC and Warner Bros. said 'you could have him for the first two episodes' and we were like 'great!' I'm not going to sit here and say that there's never going to be a world in which there's a Superman TV show and that Tyler's going to star in it - I don't know what the future holds, but right now that's not our focus. Right now, we're working on Supergirl, which is the flagship, and we're working on a way for Tyler to reprise the role. That's really what our focus is: on Supergirl."

Superman was often referenced throughout the first season of Supergirl, which aired on CBS, but he was never seen up close, until last week's Supergirl Season 2 premiere. The Man of Steel's presence certainly did help the premiere, with Supergirl setting a CW ratings record, with the show pulling in 3.02 million viewers, the most-watched Monday 8 PM show in eight years. With Superman returning to the small screen tonight, it could be another ratings coup for Supergirl, but we'll have to wait and see how the show fares after Superman parts ways.

This season follows Kara as she leaves the safety of being Cat Grant's assistant in order to figure out what she really wants to do, while as Supergirl she continues to work at the DEO, protecting the citizens of National City and searching for Jeremiah and Cadmus. Along the way, she will team up with Superman (Tyler Hoechlin) to battle new villains, as she strives to balance her personal life with her life as a superhero. New additions to the show include Lynda Carter, the original Wonder Woman, as the President of the United States. Floriana Lima has also signed on to play Maggie Sawyer, the first ever openly gay comic book character, with the show also introducing her girlfriend Kate Kane (Batwoman), and Barbara Gordon (Oracle). Take a look at the new poster before tuning in to the new Supergirl episode The Last Children of Krypton tonight.

Related: Crisis on Infinite Earths Is the 2019 Arrowverse Crossover