WARNING: This article may contain spoilers for Supergirl season 5 episode 18. Read at your own risk.

Supergirl season 5 episode 18 is set to arrive later this week on The CW, with the title "The Missing Link." This is the last episode before the season finale, and things get even more intense for Kara/Supergirl and the rest of the team.

The upcoming Supergirl season 5 episode 18 will continue following Lex Luthor's storyline, including his plans. The episode may also feature a devastating battle against Leviathan, while Lena Luthor may learn the truth about what Project Non Nocere can actually do.

There's a lot of interesting stuff coming within this episode, and be prepared for some unexpected twists and turns leading to the season finale. Since this is the penultimate episode, it may set up some big events that will continue until the last episode.

In the synopsis of Supergirl season 5 episode 18, Supergirl and the team go head-to-head against Leviathan and Rama Khan. This is an intense battle and the team needs to do whatever they can to take down these two villains.

As for Lena and Lex, they need to join forces after the Project Non Nocere fails. The situation, however, leads the two siblings in serious danger. And because of this, Lena finally learns and understands the consequences of the Project Non Nocere.

Meanwhile, this episode is not meant to be the penultimate of the season. It can be noted that production shuts down because of the COVID-19 pandemic. The series decided to move into a different direction and deliver an alternative ending.

There are still remaining episodes this season, and these may likely be part of the sixth installment, if ever. But given the current health situation of the world, some things might be delayed so viewers may need to wait for a while.

In another report, Lex's story in the Supergirl season 5 finale might be a different one than it was first originally planned. His story may progress in the future, rather than ending it this season. Jon Cryer, who plays Lex, revealed to Entertainment Weekly about the potential changes in his character's story.

Cryer told the outlet that writers are rewriting parts of the final episode, teasing that Lex's being thwarted may not happen at all. His remarks likely hint that the superheroes may not defeat him just yet and his story will continue moving forward.

Supergirl season 5 episode 18 airs on Sunday night, May 10, on The CW. The episode is directed by Avi Youabian and written by J. Holtham and Dana Horgan.