Choose one of the following science fiction shows, which you watched religiously when it was on the air: Babylon 5, Buffy, Angel, Farscape. X-Files will work to a lesser degree.
Recall every Wham! moment that occurred over the course of that series. Every high and low point, the tension, the comedy, the anticipation, the way it felt when something wholly surprising happened that was either better or worse than anything you could imagine, the satisfaction of a well-executed season finale, the characters you loved and the ones you hated. Everything you can still look back and remember. Everything that stuck in your mind, good and evil.
Collect this pile of memories and look at it.
Now, imagine all of that happening in 1 hour and 58 minutes.
It's better than that.