Clark is in his barn one moment... and the next finds himself in a psychiatric hospital where he discovers he's been suffering from delusions that he came from another planet and has super-powers.
Season 6 Episode 12 of Smallville resulted in a 0.00 rating in the 18-49 demographic.
s06e01 - Zod
s06e02 - Sneeze
s06e03 - Wither
s06e04 - Arrow
s06e05 - Reunion
s06e06 - Fallout
s06e07 - Rage
s06e08 - Static
s06e09 - Subterranean
s06e10 - Hydro
s06e11 - Justice
s06e12 - Labyrinth
s06e13 - Crimson
s06e14 - Trespass
s06e15 - Freak
s06e16 - Promise
s06e18 - Progeny
s06e19 - Nemesis
s06e20 - Noir
s06e21 - Prototype
s06e22 - Phantom
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.