Castle (2009–2016)
4 user 2 critic

The Final Frontier 

When a body is found at a sci-fi convention, Castle and Beckett are warped into the heart of fandom -- a world of egotistic celebrities, diehard costumed fans, impressive gadgets, and enough drama for two galaxies.


Jonathan Frakes


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




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 science fiction convention, Nebula 9 - super-fan Audrey O'Neill, who finally organized a life performance starring the short-lived series' original cast as well after decade of 'webipsodes' with a nerd couple, is found dead on set, killed with a real 'space laser' (of which only two working ones were custom-made). Castle, who thinks he has better taste, is amused to find Becket was part of a college fan group. 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 »

Did You Know?


According to Jonathan Frakes, the production schedule of the fifth season was arranged specifically so he would be available to direct this episode, given its content. See more »


Kate Beckett: So, do you have a cause of death?
M.E. Sidney Perlmutter: It was a burn. A burn that penetrated tissue, muscle, and bone, leaving this perfectly cylindrical hole.
Kate Beckett: Well, what kind of burn does that?
M.E. Sidney Perlmutter: Well, one created by high levels of infrared radiation. The blood vessels were *cauterized* by the intense heat.
Kate Beckett: Are you saying...
Richard Castle: She was killed by a phaser?
M.E. Sidney Perlmutter: [hesitant] Well, as much as it pains me, Mr. Castle is... largely correct. She was killed by a high intensity laser beam.
Richard Castle: A real sci-fi murder
[lowered voice]
Richard Castle: at a sci-fi ...
See more »


References Battlestar Galactica (2004) See more »


Tesla Girls
Written by Paul Humphreys and Andy McCluskey
Performed by Orchestral Manoeuvres in the Dark
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User Reviews

In Jokes Galore
1 August 2018 | by sarahmichelleheideSee all my reviews

Fun episode! Lots of in jokes sci-fan fans will love it, and it's directed by Jonathan Frakes of Star Trek: The Next Generation fame.

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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 »

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