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This is the ninth season finale of Smallville.
During the exciting hour, Zod and his soldiers launch an attack on Earth, resulting in a face-off between Clark and Zod.
Chloe, meanwhile, gathers reinforcements to help defeat the Kandorians, while Zod poses as the Blur asks Lois to steal the Book of Rao from Clark.
Elsewhere, Tess' life is on the line; and Oliver vanishes after trying to help Chloe defeat the aliens.