Smallville (2001)

S4E14 Krypto

Lois inadvertently runs over a dog and decides to take it back to the farm for care. Clark soon discovers that the dog possesses super-strength. Delving deeper, he learns the animal was part of a failed LuthorCorp experiment and that criminals are exploiting these dogs to aid in their heists. Meanwhile, Lana is curious about Jason's activities with his mother, prompting Jason to confront Genevieve with some questions of his own.