More Fringe: Leonard Nimoy to guest-star, and you'll never guess his role

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Dec 14, 2012, 3:54 PM EST

SPOILER ALERT: As if there weren't enough Fringe news today, now comes word that Star Trek's Leonard Nimoy will guest-star on the Fox sci-fi show as none other than the mysterious William Bell, former partner of Walter Bishop (John Noble) and founder of the mysterious Massive Dynamic, according to Entertainment Weekly's Michael Ausiello.

The magazine confirmed that Nimoy will join the cast in the show's first-season finale, "There's More Than One of Everything," airing May 12, and then return in the fall for an extended arc.

This will mark Nimoy's third collaboration with Fringe co-creators Roberto Orci and Alex Kurtzman this year: He'll also appear in Star Trek, which the duo wrote and which was directed by Fringe co-creator J.J. Abrams. Nimoy may also voice the Fallen in this summer's Transformers: Revenge of the Fallen, which Orci and Kurtzman also wrote.