Stana Katic, Nathan Fillion, Jon Huertas Stana Katic, Nathan Fillion, Jon Huertas

On Monday's Castle (10/9c, ABC) our titular mystery writer believes he's being haunted. So, who's he going to call for help? (Hint: It's not the Ghostbusters.)

When Castle (Nathan Fillion) and Beckett (Stana Katic) investigate a string of strange deaths, Castle accidentally watches the "haunted DVD" that he believes might be causing their victims to croak. Cue a full-on panic attack by Castle, who believes he's marked for death.

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