William Atherton the GB cameo for Halloween Castle?

It’s just been announced that William Atherton will play a cryogenics expert in an October episode of the ABC police mystery, Castle (starring Nathan Fillion). This looks a lot like he will be the Ghostbusters alumnus to make a cameo on the Ghostbusters referential Halloween episode, though this hasn’t been confirmed yet. This does conflict with the producer’s public wish that they get Aykroyd to guest star. Perhaps we’ll get more than one Ghostbusters actor! Or maybe October will just be full of them making cameos in different episodes.

Full story after the jump.

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