SPOILERS: This post contains details about the Yellowjackets, Season 3 episode ‘A Normal, Boring Life’

With two episodes left in the season, Yellowjackets finally revealed one of its biggest guest stars yet.

Co-creators Ashley Lyle and Bart Nickerson previously spoke to Deadline ahead of this weekend’s episode ‘A Normal, Boring Life’, in which Hilary Swank was revealed to be the adult version of Jenna Burgess’ character Melissa.

“At first, when we aired the first couple episodes, I felt like, ‘They’re on to us,’” admitted Lyle. “I think that a lot of people are assuming at this point that she is adult Melissa, but I saw things like, she’s an FBI agent, she’s a relative of somebody, and they were all very interesting, good guesses.”

Otherwise, Lyle and Nickerson have both “taken a very big step back from the Reddit” and other social media platforms when it comes to reading fan theories and discussions.

After receiving a tape in the mail that contains audio of their frog scientist murder in the wilderness, Shauna (Melanie Lynskey) tracked down the daughter of one such scientist, only to find that she’s now married and has a family with Melissa, whom Shauna and her teammates believed was dead.

With a volatile situationship evolving between teen Shauna (Sophie Nélisse) and Melissa (Burgess) in the ’90s timeline, their modern-day reunion is made all the more dramatic.

And as adult Melissa denies blackmailing the group, Shauna’s animalistic side resurfaces, forcing her ex to eat a slice of her own flesh in the final moments of the episode.

Fans will have to wait to see how the reunion plays out when a new episode streams next Friday on Paramount+ with Showtime before airing Sunday at 8 p.m. on Showtime.