- Alternate Character Interpretation: The titular Charlie X and his final comeuppance. A My God, What Have I Done? moment and final panic, or a sociopath willing to say anything to stay in this realm? Hell, Charlie in general. Misunderstood Jerkass Woobie or just a brat with godlike power and a Hair-Trigger Temper?
- Hilarious in Hindsight: Uhura flirtily teasing Spock in song in light of the 2009 movie.
- Values Resonance: While talking to Charlie about his crush on Janice, Kirk tells him that romance isn't a one-sided thing and one has to consider whether the other person wants those attentions.
YMMV / Star Trek S1 E2 "Charlie X"