Tailkinker

Chosen answer: He simply chose to leave the show. He wanted to move on; seven years is a long time to devote to a single project, so he felt it was time to move his career onwards. As a result, the character of Lex, which they'd taken as far as they realistically could anyway, was written out of the show. It's certainly not out of the question that he could make a guest appearance in a future storyline, much as Kristin Kreuk, who also left the show at the end of season seven, did in the middle of season eight, but so far this has not occurred.

Tailkinker ★

Answer: He does have hair in real life.

Tailkinker ★

Answer: Yes, he did actually shave his head for the part. However, after being shaved, makeup artist did work on his bald head to hide his hairline and give him the look you see. Producers were always expecting him to shave, but they did allow Michael to see what wearing a bald cap would entail and even he didn't like the look of it (he said it made him look like a conehead was looked fake) and suggested he shave his head.

Bishop73

Answer: In the comics, Krypto is a dog from Krypton who was used as the passenger in a test launch by Jor-El, Superman's father, before he launched the actual rocket taking his infant son to Earth. Krypto's capsule was involved in a mishap, sending it out of Kryptonian orbit and eventually found its way to Earth where he linked up with the young Clark Kent. Like any native of Krypton, Krypto has superpowers on Earth. In Smallville, the dog is a standard Earth dog who has been experimentally injected with kryptonite, giving him super-strength for a limited period of time, who escapes and links up with Clark (who suggests the name Krypto, ostensibly because of the dog's cryptic origins). It doesn't take too long for the dog's strength to fade, and the Kents decide to keep him, although they ultimately name him Shelby, after a dog that Martha Kent had in childhood.

Tailkinker ★