Let us presume Star Trek has a morality behind it, perhaps even a consistent one. What would be the episodes which best illustrate the and ethics demonstrated in the show? What the central "message" of the franchise is to outsiders. You can choose from any of the series or even EU if you want. Note, I'm not asking about expressing YOUR morality or most moral period in an objective sense but more the morality forwarded by the show itself. In RL, you can believe Star Trek morality may be wrong (especially in terms of interference, just war, or tolerating human rights abuses via peace-making with 'bad guys') but that's not what this thread is about. It's about Trek's morality. Likewise, just to make this interesting, you can also choose episodes for illustrating the WORST episodes (or perhaps, let us say, most dissonant) with the message. The ones which may or may not be GOOD but seem to have a morality or message opposed to what we normally think of Trek. For me, Star Trek's morality is in the "Seek out new life, and new civilizations" mantra. It's about finding different people, different species, and learning from them. You may disagree with them, you may be repulsed, but you accept them on their own terms and broaden your horizons. It's, as John Stewart would say, the "m'kay racism is bad" show. But also the show about being okay with differences in culture, religion, and morality too. Best Episodes TOS had a lot of these, I can't even begin to discuss them. "Errand of Mercy", "The Corbomite Maneuver", and even "Space Seed" for me are all very good. "The Undiscovered Country" and "The Motion Picture" are the most peace-friendly of the movies. For TNG, I'll nominate "Hugh." Voyager, I'll also give credit for "In the Flesh" which sacrificed Species 8472's capacity as villains to, instead, be about peace-making. Likewise, "Living Witness." Deep Space Nine is one I'll have to think about since a lot of its episodes are about the opposite of making peace or how difficult it is. I'll have to cheat and do "Duet" which is just about personal forgiveness. Not sure about Enterprise. Oddly, "A Night in Sickbay" pops up for me because I'm a dog owner. If anything happened to my dogs, I'd start bombing the planet. Worst Episodes This is not a value judgement, just an observation. Also, it's not about MY morality, either. For instance, I don't feel ENT: Terra Nova is very moral at all but it's somewhat Trekkian. Likewise, "In the Pale Moonlight" is deeply immoral but value neutral for Trek morality, IMHO. TNG's "The Neutral Zone" has the Enterprise crew show remarkable disgust for past humans as well as outright bigotry. VOY's "Ashes to Ashes" for me just had a rather bad taste in my mouth. The idea that our crew member was unable to reassimilate to Federation life. ENT's "Dear Doctor" is about how two races can't live together. Forget charges of eugenics, the premise is that diversity makes one race WEAKER than the other. That's like the most anti-Trek thing I can think of. Mixed I think Star Trek has some great episodes about challenging morality too. The ones where the heroes aren't very moral but it encourages you to think. TNG's "Half a Life" has a terrible situation brought about by one culture's stance on euthanasia versus our heroes. The Borg, by nature, challenge the idea of the Federation by being seemingly antithetical to everything it believes.