Patti Perret/FOX
Christopher Rosen
October 24, 2015 AT 12:00 PM EDT

Not even the cast of Scream Queens knows how the first season might end.

Cast members Lea Michele, Emma Roberts, and Keke Palmer have received the script for the show’s 13th episode, but not the whole thing.

“They get everything but the last act, because I don’t trust them,” creator Ryan Murphy told EW’s Tim Stack at the first-ever EW Fest on Saturday in New York.

So what can fans — and the cast — expect to see in the last episode? “The killer is revealed and we spent a lot of time taking the audience through how the killer got away with what they got away with,” Murphy teased. “So lots of flashbacks, lots of twists and turns.”

For a full breakdown of the Ryan Murphy & Friends panel, head here. Watch Murphy discuss Scream Queens in the video above.

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