The Host, TNG 4
Trills are introduced to the world of Trek and they just may be more trouble than they’re worth. So much isn’t explained about their world here (wait til DS9) but the overall concept is pretty cool. A dual-life form of symbiote and host – kind’ve a Dr. Who thing, but the host (I guess) is a real person first. Anyway, gay rights activists were offended by this episode and they had a right to be. Dr. Crusher is willing to go to bed with Riker (whom she thinks of like a brother) but kiss a girl? No way.
A real problem: and this happens from time to time — the LA surfer dude phenomenon. Was every casting person on vacation when they put out the call for Odan? Ridiculously bad.