When Castle and Beckett learn that a murder victim may have been poisoned at an Old West-style resort, they visit the resort posing as newlyweds to uncover the truth.
Castle and Beckett must go undercover at an old west resort.
Molly returns to space in an attempt redirect the Seraphim away from Earth and protect the world's population from the deadly spores.
When Molly finally comes face-to-face with her offspring, she realizes she may be the only one who can stop the coming danger.
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