
Considering every character in Smallville reboots at the end of each episode and is as naive about Clarke's superpowers from one week to the next (despite witnessing Kal El performing ever-more amazing feats), it's curious that show's token two-dimensional villain is the only series regular to have evolved in any way.
Actually, that's not fair. Chloe knows Clarke's secret and is all the more useful for it, Lex no longer hides his enmity towards superboy, and Lois is fast turning into the Teri Hatcher incarnation we saw in Lois & Clarke. But let's forget about them.
John Glover is the silent star of Smallville. His Lionel Luthor has slowly switched from being the villain behind many of the freaks of the week to a respectable, seemingly benevolent father figure for Clarke - keeping his superhero status a secret and no longer wanting to use those powers for his own means. Lionel's involvement with the Kents has humanised him, just as Lex's friendship with Clarke made him a better person in earlier seasons. His involvement in Jonathan's death stirred some sort of conscience in him, and Martha's forgiveness of this has offered Lionel redemption. He's no longer the bad guy in his fights with Lex, though is still the protective father. As the mythology of the series requires Lex to become the big bad, Lionel had to pass that mantle on to his son. And Lex is going to be pretty evil this series.
Besides, surely Glover's Smallville hairpiece should a show of its own?

