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The Wrong Stuff
Season 7, Episode 16
Air date February 23, 2015
Written by Terri Edda Miller
Directed by Paul Holahan
Episode guide
"Hong Kong Hustle"
Temp-Castle Season7.jpg
Season 7
September 29, 2014 - May 11, 2015
Season 7 is now available on DVD  

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Season 6   Season 8

The Wrong Stuff[1] is the sixteenth episode of the seventh season of Castle.


When an astronaut training for a trip to Mars is mysteriously killed inside a Mars simulation, Castle and Beckett don spacesuits to investigate. But when they discover no one inside the sealed simulation could have committed the murder and no one from the outside could get in, the case takes a shocking turn.




Main Cast

Guest Cast

  • Yves Bright as Tom Richwood
  • Gwendoline Yeo as Elise Kim
  • David Rogers as Viggo Jansen
  • Sterling K. Brown as Ed Redley
  • Maxwell Caulfield as Sir Ian Rasher


Castle: The rover did it!
Beckett: Are we seriously about to interrogate a computer?
M.I.R.A.: Detective, the word "interrogate" implies you believe that I am guilty of something. Of what do you think I am guilty?
Castle: Well at least she's not asking for a lawyer.
Castle: I wanted to go to Mars, not die on Mars.
Beckett: Wait a minute: we're not on Mars, we're on Earth.
Javier: Wait, you're saying the computer tried to kill you?
Castle: Yeah, just like in 2001. Kubrick was right: AI is a bad idea.

Featured Music


  • This episode contains several references to 2001: A Space Odyssey
    • When Castle is prentending to moon walk, the initial fanfare (titled "Sunrise" in the composer's programme notes) Also Sprach Zarathustra plays.
    • The mission computer MIRA is an AI that is interacted with via voice control, which Castle states is "a little 2001" and Dr. Rusham Haroun refers to as "more Siri than HAL".
    • The Castle and Beckett return home, Martha can be heard singing "Daisy Bell", the song that HAL sings as he is dying.
    • When Viggo Jansen asks MIRA to run a diagnostic, MIRA says "I'm sorry, I can't do that" a reference to the famous line "I'm sorry Dave, I'm afraid I can't do that".
    • When opens the vents, Castle yells for MIRA to "Open the pod-bay door". This is the same command that Dr. David Bowman is giving HAL when he refuses to comply.
    • Like HAL, MIRA came to believe that a human would compromise her mission.
  • Immediately after parodying the Star Trek opening voiceover, Castle and Beckett are let into Newton Endeavors by a security guard using the code "4747". Occurances of the number 47 have been inserted into the Star Trek series and movies since 1990 in dialogue, signs, and labels as an in-joke.


Related links