ABC has just revealed the ominous title for Agents of S.H.I.E.L.D.'s Season 5 finale: "The End." The episode will air Friday, May 18 at 9:01 pm on ABC. Its title could refer to the end of the world, which has been teased since the season premiere, or the conclusion of the series itself, as it has not yet been renewed.

At the time of writing, Agents of S.H.I.E.L.D.'s renewal status is up in the air. A recent rumor suggests that the Marvel series will indeed return for a sixth season; further, the show will reportedly move from Friday back to its original Tuesday night time slot. However, there have been no official announcements from ABC regarding Agents of S.H.I.E.L.D.‘s return.

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“You’ve heard the phrase, we are ‘cautiously optimistic.’ Certainly from a creative place, I think everyone can agree that the show’s never been stronger," Head of Marvel Television Jeph Loeb told reporters at WonderCon. "The cast’s never been closer. To do a hundred episodes of anything, and not have everyone go at the end of the day, ‘Yeah, see you tomorrow. Maybe!’ This group is there of each other in every way imaginable. Their willingness to work out each other’s schedules, hanging out together on the weekends -- this is a show that was about the creation of a family, and in doing so, we created a family. We’re just incredibly proud of everyone that’s involved.”

Regardless of a renewal, the show’s Season 5 finale has been written as a series ending, as indicated by the episode's foreboding title. “We’re ready for if this is the end,” executive producer Jed Whedon revealed in February. “We’re definitely going to make it rewarding either way.” Executive producer Maurisa Tancharoen added that the finale could serve as “either” a suitable capper for the season or the entire series.

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If the show does get renewed, the minds behind Agents of S.H.I.E.L.D. have plenty of ideas for Season 6 — and that’s thanks in part to Avengers: Infinity War. “The thing that we love about what our show has become is, the movies sort of blaze a path. Doctor Strange introduced magic, all of a sudden we could have Ghost Rider on our show. We’re just waiting for that movie to come out, so it can open up a whole new playground for us,” Whedon teased last month.

Airing Fridays at 9 p.m. ET/PT on ABC, Marvel’s Agents of S.H.I.E.L.D. Season 5 stars Clark Gregg, Ming-Na Wen, Chloe Bennet, Henry Simmons, Ian De Caestecker, Natalia Cordova-Buckley and Elizabeth Henstridge.