Here are my favorites: 1. Arena 2. The Doomsday Machine 3. Amok Time 4. Mirror, Mirror 5. Metamorphosis 6. Where No man Has Gone Before 7. The Ultimate Computer 8. Balance of Terror 9. Spectre of the Gun 10. Journey to Babel Does The Cage Count? If it does put it at #1 and move everything else down. It was pretty tough to pick only 10. I have several more that could have made my list. In recent years I notice A Piece of the Action shows up alot on people's lists. I remember when most fans had it as one of the least favorites, then Voyage Home came out and suddenly Piece of the Action is a favorite.