Smallville: Descent

The secret of Veritas leads Lex in a dangerous direction when he kills Lionel for a key that holds the secret to control Clark. Lois, Jimmy and Chloe find evidence that Lex killed Lionel and all their lives are put in danger as Lex's underling stops at nothing to protect her boss. Clark now has to stop Lex from uncovering whatever secret is held in the lock box in Geneva.