In episode
1.4 X-Ray, Clark developed his newly-found x-ray vision. At first he had the
traditional Superman "See-Through" vision, however, as the X-Ray Vision
developed throughout the episode it became like an actual x-ray as you can see
on the Main
Power Guide
. The pictures above are when Clark first saw
"see-through." He and Pete are climbing a crope in gym class and Clark sees
through Pete's skin.