Neither Castle nor Beckett look happy with the state of their investigation on Castle. "A Murder Is Forever" is the eighth of the show's sixth season.
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Are these two suspects in the murder of a therapist on Castle. "A Murder Is Forever" is the eighth of the show's sixth season.
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What is the importance of this stone to the murder investigation on Castle? "A Murder Is Forever" is the eighth of the show's sixth season.
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Are these some of the therapists clients on Castle? "A Murder Is Forever" is the eighth of the show's sixth season.
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Ryan's wearing plaid for the latest investigation on Castle. "A Murder Is Forever" is the eighth of the show's sixth season.
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Castle and Lanie both work the case of the dead woman found in the car on Castle. "A Murder Is Forever" is the eighth of the show's sixth season.
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Lanie examines the dead body in the car on Castle. "A Murder Is Forever" is the eighth of the show's sixth season.
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Dr. Lanie Parish helps investigate the death of a relationship therapist on Castle. "A Murder Is Forever" is the eighth of the show's sixth season.
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Castle Season 6 Episode 8 Quotes

Castle: You see, I'm honoring you by inviting you into my territory and Linus is part of that territory.
Beckett: And if you want to be invited into my territory again, you should probably rethink that.

Beckett: There's been a murder.
Castle: Yeah, of Linus' feelings.