A black kryptonite explosion splits Lex in two and his evil side - Alexander - is released. Alexander imprisons Lex in the mansion then gives full vent to his evil side - he threatens to evict Lana from the Talon unless she becomes his mate, jousts with Lionel, and tries tohug Clark and Chloe when they figure out his secret.
Season 4 Episode 17 of Smallville resulted in a 0.00 rating in the 18-49 demographic.
s04e01 - Crusade
s04e02 - Gone
s04e03 - Facade
s04e04 - Devoted
s04e05 - Run
s04e06 - Transference
s04e07 - Jinx
s04e08 - Spell
s04e09 - Bound
s04e10 - Scare
s04e11 - Unsafe
s04e12 - Pariah
s04e13 - Recruit
s04e14 - Krypto
s04e15 - Sacred
s04e16 - Lucy
s04e17 - Onyx
s04e18 - Spirit
s04e19 - Blank
s04e20 - Ageless
s04e21 - Forever
s04e22 - Commencement
Smallville tells the tale of a teenage Clark Kent in the days before he was Superman. It is the town where he came from where very strange things started happening with his arrival in a spaceship in the midst of a meteor storm of green rocks.
Clark must deal with a variety of individuals given powers by the green rocks, keep his powers a secret, cope with his friendship with a young Lex Luthor, and balance the two girls in his life, Chloe and Lana. The show also shows us how Lex Luthor develops from a friend of Clark's and kinda-okay guy to (presumably) the villain who will plague Superman in his later years.