What makes a Star Trek episode a guilty pleasure?

We all have them but some are easier to admit than others. Are we convinced that an episode is bad because of peer pressure? Or deep down do we know it's bad but we just don't care? Is it the premise, the writing, the story, the acting, the directing, or all of the above? In this week's episode we try to find out what it takes to be considered a guilty pleasure Star Trek episode.