Other mistake: In the opening credits of the original broadcast, Kristin Kreuk's first name is misspelled as "Kristen." The credits sequence, which was new for Season 5, was corrected by the time the second episode of the season aired.
Continuity mistake: The blood on Lana's face is different then how it was in the previous episode. While at the crater in Commencement she has two distinct lines of blood on her face. One on her left cheek is thick and the one on the right cheek goes down past her lips. While at the crater in this episode the left line is then while the right line is shorter. These two scenes should be identical since Arrival picks up right after Commencement.
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 ★