30 Day Star Trek Challenge Day 4: Favorite Original Series Episode

With some big anniversaries over the last few years for Star Trek, the month of May is all about the property. It has a long and rich history across pretty much every kind of media and has legions of fans that can engage in these different areas, often without much crossover as well.

Today, we want to dig into some of the things that define fans of the property by talking about what the Original Series show with who was your favorite and least favorite episode?

Bonus question: What episode had the most unrealized potential?