Castle Gets a Mr. Freeze in William Atherton

William Atherton has booked a chilly guest spot on the upcoming season of Castle, has learned exclusively.

The veteran actor will play Dr. Ari Weiss, a "life-extension researcher" who has dedicated most of his work to the study of cryogenic freezing. When Castle (Nathan Fillion) and Beckett (Stana Katic) happen upon a murder scene with no victim, their search for the missing body soon leads them to Dr. Weiss' work — not to mention a bunch of other frozen corpses...


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