[s1e17] - Reaper

A major highlight is the contrast between various father-son relationships:

Unlike many villains, Tyler is portrayed sympathetically; he eventually takes his own life when he realizes his mother is still alive and would be horrified by what he has become. [S1E17] Reaper

Lionel Luthor sends an auditor, Dominic Santori, to investigate Lex Luthor , exposing Lex's secret investigation into Clark's family. A major highlight is the contrast between various