Season 2 Episode 5


Aired Friday 10:00 PM Oct 21, 2005 on CBS



  • Trivia

    • Opening Numb3rs:
      1 ASSASSIN

    • The Math:
      Transposition Cipher
      Game Theory
      Paper Plane

      The game theory used in this episode was hide-and-seek game theory. Specifically, two-person constant-sum "hide-and-seek" with unique mixed-strategy equilibria as described by Rubinstein, Tversky and Heller.

    • The oil painting of Dr. Gary Lorden seen in the hallway outside Charlie's office was created to resemble the painting of Alfred P. Sloan in the CalTech math department.

    • Of all the possibilities that Charlie comes up with about possible staged accidents when he is interviewing Ruiz, he fails to mention the large stretch of water they are sitting by, which the killer later tries to use as a secret assassination.

  • Quotes

    • Don: I'll tell you what, you help me catch this guy and I-I'll go to Aunt Irene's next party, all right?
      Charlie: Deal.

    • Charlie: Hide and seek.
      Don: What are you talking about, like the kids' version?
      Charlie: A mathematical approach to it, yes. See, the assassin must hide in order to accomplish his goal, we must seek and find the assassin before he achieves that goal.
      Megan: Ah, behavioral game theory, yeah, we studied this at Quantico.
      Charlie: I doubt you studied it the way that Rubenstein, Taversky and Heller studied two person constant sum hide and seek with unique mixed strategy equilibria.
      Megan: No, not quite that way.
      Don: Just bear with him.

    • Charlie: Aunt Irene hates you.
      Alan: No, she doesn't hate me. She was just a little disappointed at your mother's choice of spouse.

    • Don: So, does that make me a three-step thinker?
      Charlie: You keep working with me, you'll get there soon enough.
      Don: Shut up.

    • Colby: You assaulted a federal agent with a deadly weapon.
      Henry: It was a Volkswagen.

    • Charlie: What are you doing here?
      Don: Hey. Well, I'm ready to party like it's 1899.

    • Don: So what does all your behavioral science training tell you about a grown man who still lives with his mother?
      Megan: Probably about the same as two brothers still mooching meals at their dad's house three nights a week.
      Don: Hey, technically it's my brother's house, but o-okay, Megan, I-I see how it's gonna be.
      Megan: (grins) I just call 'em like I see 'em.

    • Alan: (to Charlie on assassinations) When it's done right you never do find out who did it. Kennedy...Dallas...'63. They're still waiting for an answer on that one.

    • Don: (catches paper airplane) Who made this?
      Charlie: Me. Why?
      Don: (examines the plane) Wings are a little thin here buddy.
      Charlie: Forgive me if all my years of advanced applied mathematics take issue with that assessment.
      Don: Yeah... well... you'll forgive me if all my years of high school detention say I'm right . Go ahead... you make those wings wider... it'll fly.

    • Larry: How'd you come by all this hard data on assassination techniques?
      Charlie: I have a friend at the NSA who has a friend at the CIA.
      Larry: Yeah, don't even tell me.

    • Larry: A Fleinhardt? When did my name become a predicate adjective?
      Charlie: When your students started using it that way.

  • Notes

    • Music featured in this episode was "All Over" by Obscurities (Charlie listens to his headphones).

    • The character of Charlie and Don's Aunt Irene – spoken of, but not seen in the episode – was named after Cheryl Heuton's grandmother's sister's daughter (first cousin once-removed).

    • This episode was originally slated to play as the first episode of the season, but was moved back to third, then to its final airing of fifth in the season.

    • This episode was rated TV-PG (V).

    • International Airdates:
      Czech Republic: May 22, 2009 on TV Nova
      Slovakia: October 26, 2009 on JOJ

  • Allusions

    • Don: A little Glenn Miller. A lot of chicks. What could be better?
      Don referred to Glenn Miller, an American jazz musician and band leader in the Swing era. After a very successful career, including many famous recordings, he disappeared under mysterious circumstances during World War II.

    • Amita: How's the hunt for Red October going? You know... the assassin?
      Amita references the 1984 novel by Tom Clancy, The Hunt for Red October. The 1990 John McTiernan film adaptation starred Sean Connery and Alec Baldwin, and was dramatized by screenwriter Larry Ferguson.

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