For "Star Trek: The Original Series" (TOS), there are two popular viewing orders: the original air date order and the production order. The best viewing order can depend on your personal preference and whether you prioritize the continuity of production or the experience of the audience at the time of the series' original airing. **Original Air Date Order:** Watching the episodes by their original air date means you experience them in the same way audiences did in the 1960s. This order doesn’t follow the production sequence, which can result in some inconsistencies in character development and storytelling. The first episode aired was "The Man Trap" on September 8, 1966, while the last one was "Turnabout Intruder" on June 3, 1969. **Production Order:** The production order refers to the order in which the episodes were actually filmed. This is often considered by some fans to be a preferable way to watch the series because it provides a smoother continuity in terms of set design, uniform changes, and character development. This order would begin with "Where No Man Has Gone Before" as the first episode to watch. **Recommended Order:** If you're looking for a viewing order recommendation for "Star Trek: The Original Series," I would suggest the production order. This is mainly because production order tends to ensure better continuity and gradual character development, which can enhance your understanding and enjoyment of the series. Below is a sample of the first several episodes in both the original airing and production sequences: **Original Air Date Order:** 1. The Man Trap 2. Charlie X 3. Where No Man Has Gone Before 4. The Naked Time 5. The Enemy Within **Production Order:** 1. Where No Man Has Gone Before 2. The Corbomite Maneuver 3. Mudd's Women 4. The Enemy Within 5. The Man Trap Regardless of the order you choose, "Star Trek: The Original Series" offers a classic science fiction experience, and you'll be able to appreciate its groundbreaking storytelling and legacy within television history. Enjoy your journey aboard the Starship Enterprise!