|A Murder Is Forever|
|Season 6, Episode 8|
|Air date||November 11, 2013|
|Written by|| Chad Gomez Creasey & |
Dara Resnik Creasey
|Directed by||Bill Roe|
When a famed relationship therapist is murdered, it appears that her access to the secrets of her elite and powerful clients led to her death. But when Castle and Beckett discover the victim was in possession of a rare object worth millions of dollars, they realize that this case may be even more complicated – and dangerous – than they thought.
- Nathan Fillion as Richard Castle
- Stana Katic as Detective Kate Beckett
- Jon Huertas as Detective Javier Esposito
- Seamus Dever as Detective Kevin Ryan
- Tamala Jones as Dr. Lanie Parish
- Penny Johnson Jerald as Captain Victoria Gates
- Molly C. Quinn as Alexis Castle (credit only)
- Susan Sullivan as Martha Rodgers (credit only)
- Anthony Ruivivar as Barrett Hawke
- Jason Antoon as Steve Warner
- David S. Lee as Matt Lanchet / Leo Wyngaard
- David Blue as Kyle
- Maya Stojan as Tory Ellis
- Dominic Hoffman as Andrew Spencer
- John Hans Tester as Edward Peters
- Christine Corpuz as Receptionist
- Bonnie Hellman as Frumpy Nightgown Woman
- Tina Morasco as Janet Warner
- Carter Roy as MC
- 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.
- Esposito: You really buy that?
- Ryan: Uh, yeah. Skimmed through her book. I think there might be something to her theory. For instance, she said that in every relationship, there's needs to be masculine energy and feminine energy, even in ours.
- Esposito: Oh. Well, we know which one you're are.
- Ryan: I don't know about you, but I'm very comfortable in my masculinity.
- Esposito: You do realize you're wearing a sweater vest, right?
- This is the second episode to feature diamond smuggling central to the main plot's case - the first episode was season 2's The Third Man, where a trio of conspirators were using an exotic pet shop as a front for illegal imports.
- During Castle and Beckett's argument over Linus the lion, they handle the elephants on Beckett's desk, which will be crucial to a later episode.