December 15, 2014 9:00 AM EST

The CBS sitcom Two and a Half Men won’t end until February of next year, but star Ashton Kutcher may have already given away some of the series finale’s plot.

During an appearance on The Ellen Degeneres Show, Kutcher revealed that while the show hasn’t filmed its final episode, he has been pitched the plot and is “a little terrified.”

The actor squirmed and was left speechless when Degeneres asked whether the finale would involve the return of former star Charlie Sheen, whose character was killed off in the beginning of season nine after Sheen was fired from the show. When Degeneres concluded from his reaction that his return was in fact in the works, Kutcher didn’t exactly deny it.

“Here’s the thing,” Kutcher said, “if you’re working on the Warner Bros. lot, if there are sirens, come save me.”

Watch the exchange, above, and watch the full clip here.

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