ST:TOS:24 - "Space Seed" (Stardate: 3141.9) - this is the 24th episode of season 1 that went into production (though it is the 22nd episode shown on TV). This is the only episode that spawned a Star Trek movie - that being Star Trek II: The Wrath of Khan. It starred the incredible actor Ricardo Montalban (also in the aforementioned movie as well as other films such as The Naked Gun) as the "superior" Khan Noonian Singh who is revived after 2 centuries (he is from the 1990s) in suspended animation. Though the crew of the Enterprise don't know who he is at first, it soon becomes frighteningly obvious. This is truly a classic episode that everyone should see, especially if you want to understand the events that brought on "the Wrath of Khan".
Review of Space Seed
