The CW network have released the official episode description for the next new episode of Smallville titled "Subterranean" which is due to air on December 7th.
Clark is shocked to discover his neighbor Jed McNally is holding migrant laborers captive and forcing them to work on his farm. Feeling guilty since he sees himself as the ultimate illegal immigrant, Clark seeks help from Martha to allow a young boy and his mother to stay in the country.
