3. The Hur'q - Invaders of the Klingon Homeworld
See that image in the background, that is all we get of the Hur'q! It is just mind boggling! After all, these are the aliens that brought the Klingon empire to its knees! They ransacked Qo'nos, the Klingon home world and took their most prized artifact, the legendary sword of Kah'less! Do you know how super badass you have to be to cruise through Klingon space uninvited, then to stop at their home world for a good ransacking? To put this into perspective, there was no Klingon word for "invader" before the Hurq. I am basically drooling right now at seeing that battle! Still, do we get to see one, just one, image of the Hur'q, maybe even a hologram?! Nope! All we get is the dusty old cave where the Hurq hid the legendary batleth (sword) and the symbol in the background. Damn, damn, damn! Bottom Line: This could have easily just have been a quest to find a long lost, misplaced sword. Stuff goes missing from history all the time unrelated to ransacking invaders. Why did the writers have to wet our appetites for a species that could best the Klingon's deep in their own space?