As I keep saying, the best explanation for different-looking Klingons is that it's a star-spanning empire made up of hundreds of planets, and we encounter many different "Klingons" who are from many different planets. Simple. But NOOOoooo!Actually, I would LOVE to see the Empire as an actual Empire. Not just a planet. (I suppose they could have colonized an uncharacteristically empty - for Star Trek - section of space and it's an empire sized of systems but it's all lunatics from Qo'noS.)

