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star Craig Horner has landed a guest-starring role on

— and EW can exclusively reveal that he will be playing the Count of Monte Cristo.

Horner will appear in at least one episode in season 6, though details on what he’ll be doing are being kept under wraps. The Count’s introduction comes in the wake of the show introducing the Land of Untold Stories, which opens up the storytelling possibilities to pretty much everyone.

is an Alexandre Dumas novel that tells the story of an innocent man wrongly imprisoned, who returns years later to take his revenge on those who betrayed him. (ABC’s

news on Saturday, when the cast and executive producers will appear at Comic-Con. 

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