Castle (2009–2016)
4 user 1 critic

The Final Frontier 

During the annual major SciFfi convention, Nebula 9 - super-fan Audrey O'Neill, who finally organized with a nerd couple a life performance there starring the short-lived series' original ... See full summary »


Jonathan Frakes


Andrew W. Marlowe (created by), Kate Sargeant | 1 more credit »

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Episode cast overview, first billed only:
Nathan Fillion ... Richard Castle
Stana Katic ... Kate Beckett
Susan Sullivan ... Martha Rodgers (credit only)
Jon Huertas ... Javier Esposito
Seamus Dever ... Kevin Ryan
Tamala Jones ... Lanie Parish (credit only)
Molly C. Quinn ... Alexis Castle (as Molly Quinn)
Penny Johnson Jerald ... Captain Victoria Gates (credit only)
Ed Quinn ... Gabriel Winters
Christina Moore ... Stephanie Frye
Armin Shimerman ... Benjamin Donnelly
Arye Gross ... M.E. Sidney Perlmutter
Erin Way ... Audrey O'Neill
John Bobek ... Davis Hawthorne
Chris McKenna ... Simon Westport (as Chris L. McKenna)


During the annual major SciFfi convention, Nebula 9 - super-fan Audrey O'Neill, who finally organized with a nerd couple a life performance there starring the short-lived series' original cast as well after decade of 'webipsodes', is found dead on set, killed with a real 'space laser', of which only two working ones were custom-made. Castle, who has better taste, is amused to find Becket was part of a college fan gang. The team works out various personal, career and business motives as well as opportunities for cast and crew. Written by KGF Vissers

Plot Summary | Add Synopsis


TV-PG | See all certifications »






Release Date:

5 November 2012 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

16:9 HD
See full technical specs »

Did You Know?


Nebula 9 is a mash up between elements of Star Trek and Battlestar Galactica. The sets, props, and costumes (including mini skirts for the female characters) are reminiscent of the original Star Trek series. The shows early cancellation, popularity among convention goers, and plotline of a ragtag group trying to survive after a disaster, seem to be taken from the original Battlestar Galactica. See more »


Kate Beckett: So I was a "Nebula 9" fan. Big deal.
Richard Castle: Oh, you were beyond a fan. You dressed up in costume. *You*.
Kate Beckett: [sighs] Okay, yes. I was a sci-fi loving, costume-wearing geek. And you know what? Not ashamed of it or of "Nebula 9". Despite what you think, it was an *awesome* show.
Richard Castle: Hmm. I'll tell you what. I'll forgive you your terrible taste if you... try on that "Nebula 9" costume for me.
Kate Beckett: In your dreams.
Richard Castle: Look at my life. My dreams come true.
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References 2001: A Space Odyssey (1968) See more »


Tesla Girls
Performed by Orchestral Manoeuvres In The Dark
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User Reviews

Castle References to Firefly
15 April 2014 | by robinlexvaSee all my reviews

Did you know? When Caste is first belittling the "Nebula 9" series to Beckett, he contrasts it to good sci-fi shows, "Star Trek, Battlestar, that Joss Whedon show. . .". Joss Whedon was the screenwritter and creator of the 2002-03 TV sci-fi series, Firefly, in which Nathan Fillion also starred. This one of at least 3 references, probably more, which Castle makes in various episodes to the Firefly series. Another is when he dresses up as a space cowboy for Halloween, and Molly Quinn tells him the costume is so 6 years ago. The third reference I know of is when he unexpectedly speaks Chinese. When Beckett asks how he learned Chinese, Castle explains it was from some TV show he used to like.

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