Smallville :

Clark and Lex team up to rescue members of Clark's high school class after a janitor, Earl Jenkins, takes them hostage in LuthorCorp's Smallville Fertilizer Plant No. 3.

Jenkins claims his deadly 'jitters' were caused by a mysterious contaminant, and he threatens to kill everyone unless he is shown a secret sub-level, which Lionel Luthor, Lex's father, denies ever existed. Lex offers himself in exchange for the hostages, but its don to Clark to find out the secret of the facility and save the group.