Supergirl season 4 episode 18 spoilers: Willie Garson to appear

Supergirl season 4 episode 18 is going to be the first installment following the show’s current hiatus on April 21, and there’s a lot of great stuff coming up! For starters, you’re going to see Kara and Lena join forces, and we’re also going to have a chance to see an especially notable guest star in Willie Garson! You know him from Sex in the City, White Collar, and from some sporadic appearances on Hawaii Five-0.

Within this episode, you’re going to have a chance to see the actor within the role of prisoner Steve. Who is he? Well as it turns out, he may be one of the few people capable of actually handing down important information to stop Lex Luthor in his tracks. He may be a prisoner, but his impact could be earth-shattering for some of the characters within National City and beyond.

So what else is coming in this episode? Below, CarterMatt has the official synopsis with some more information as to what’s coming up:

WILLIE GARSON GUEST STARS – Kara (Melissa Benoist) and Lena (Katie McGrath) head to Stryker’s Island to search for clues on how to defeat Lex. At the prison, Kara tries to befriend a nosy prisoner, Steve (guest star Willie Garson), who may have insight into what Lex was doing, while Lena studies an array of puzzles Lex left behind in the hopes of discovering his whereabouts. While there, a prison riot breaks out and Kara must find a way to stop the prisoners without revealing her secret identity as Supergirl. Meanwhile, Kelly (guest star Azie Tesfai) encourages James (Mehcad Brooks) to talk to someone for his PTSD, and Alex (Chyler Leigh) faces off against Ben Lockwood (Sam Witwer) after he storms the DEO and acquires some powerful weapons to hunt Supergirl. Antonio Negret directed the episode with story by Rob Wright and teleplay by Lindsay Sturman & Aadrita Mukerji (#418).

We’ve been waiting to see things heat up again when it comes to the Ben Lockwood storyline, especially with him now holding a seat of so much power. This is such a challenging position for Supergirl and Alex both to find themselves in, given so much of the original mission has been tainted and there are now so many who think of Supergirl as the enemy rather than a friend. This is what makes this season so interesting — and even possibly uncomfortable for some people. It pushes you beyond just the traditional narrative of a hero versus a villain. It’s more of a story of a hero facing off against an institution and of trying to figure out how to change a narrative that continues to push against you … one that seems reluctant to turn around really regardless of whatever it is that you try to do.

This episode will be one in an arc of five that airs, with more than likely things getting progressively more intense as time goes by. We’ll just have to wait and see how this story winds down.

What do you want to see when it comes to Supergirl season 4 episode 18? Be sure to share right now in the comments. (Photo: the CW.)