Clark learns about Red meteor rock, his origins, and the true reason he has been sent to earth, and in the end tries to flee the responsibilities thrust upon him by his natural father.23 episodes in season. 166 in rank.
Jonathan goes to Metropolis to find Clark who have started a life of crime. Lexx is alive, but insane, stuck alone on a island. Both return to Smallville changed. Lexx now pursuing a real father son relationship with his father, and Clark learning more about his nature, and his father.22 episodes in season. 147 in rank.