Smallville: Covenant

When an attractive stranger named Kara shows up at Clark's doorstep, one who has powers of her own and claims to hail from Krypton, she tries to steer him toward his true purpose and coerce Jonathan into telling him about his secret bargain with Jor-El. Meanwhile, Clark's relationships with Lana and Lex take two different, but equally devestating turns, and Lex assists the FBI in its probe of Lionel.