Originally aired November 6, 2001
Written by Mark Verheiden
Directed by James Frawley
Clark begins developing X-Ray Vision, and he struggles to control his new power. Tina Greer, a metahuman with shape-shifting powers, schemes to kill Lana and take over her life. Lex turns the tables on tabloid reporter Roger Nixon when the latter tries to blackmail him.
Tropes present in the episode:
- Accidental Murder: When Tina and her mother Rose fight over the backpack full of stolen bank money, her backpack strap breaks, causing Rose to fall down the stairs and die from a broken neck. Tina is distraught by this and phones the police, but changes her mind after seeing her reflection in the cracked mirror.
- Blackmail: Nixon attempts to blackmail Lex by threatening to expose his wild past. Lex turns the tables on him by threatening to eliminate any evidence that he ever existed.
- Bullying a Dragon: Nixon tries to blackmail Lex for money. Big mistake.
- Buried Alive: Near the end, Tina seals Lana inside a stone tomb in the Smallville Cemetery. Fortunately, she's rescued by Whitney.
- Dead Person Impersonation: At one point, Tina assumes her dead mother's form to fool Martha.
- Evil Twin: Lex jokingly suggests this as a possibility after Tina robs a bank disguised as him.
- Green-Eyed Monster: Tina thinks Lana has a perfect life, which is why she decides to replace her.
- Kill and Replace: Tina's goal is to kill Lana and take over her life.
- I Love Nuclear Power: Tina gained her shape-shifting powers after being treated for soft bones with Kryptonite radiation.
- New Superpower: Clark develops X-Ray Vision in this episode.
- Power Perversion Potential: The second time that Clark's X-Ray Vision activates, he ends up seeing through a wall and into the girls' locker room, and he grins widely as he watches Lana disrobe.
- Red Right Hand: When Clark uses X-Ray Vision, Tina's bones are seen glowing green; this allows him to tell her apart from others.
- Self-Made Orphan: In the teaser, Tina accidentally causes her mother to fall down the stairs and break her neck.
- Stalker Without a Crush: Tina is completely obsessed with Lana, to the point she plots to kill her and take her place.
- Super Strength: Tina has it enough to put up a fight against Clark.
- Toplessness from the Back: When Clark peeks on Lana in the locker.
- Un-person: Lex threatens Nixon with this to rope the reporter into his service.
- Villain of the Week: Tina Greer, a shapeshifter who's obsessed with Lana.
- Voluntary Shapeshifting: Tina's power.
- X-Ray Vision: Clark develops this ability in this episode.