Unexpected ending, which leaves me with one obvious question - if Earth diseases are deadly to non-superpowered Kryptonians, why would Clark risk visiting Krypton, especially with a human companion? Clark is presumably immune due to his non-superpowered childhood on Earth, but he's got to be carrying all sorts of Earth germs, as does Lois, and on Krypton the natives (who are not super-powered under a red sun) will have no immunity to them. And Lois and Clark will probably have no immunity to any illnesses they encounter on Krypton.
In the series we saw Clark deathly ill with some sort of Kryptonian bug left on the outside of his spaceship, and that had been there for 30-odd years. If he comes into contact with kryptonians carrying really fresh viruses and bacteria he might be dead in a week!
