Don't worry, Caskett fans. Stana Katic will return to "Castle" this fall, TVGuide.com has learned.

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Katic joins co-star Nathan Fillion for the upcoming eighth season. However, showrunner David Amann has stepped down, with "The Following's" Alexi Hawley and "Castle" writer and producer Terence Paul Winter to share showrunner duties next season. The supporting cast's status for next season remains unclear.

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