Smallville
S04E17 Onyx
A blast of black kryptonite separates Lex into two distinct beings, unleashing his malevolent alter ego, Alexander. Alexander confines Lex within the mansion and revels in his wickedness. He menaces Lana with eviction from the Talon unless she agrees to be his partner, confronts Lionel in a fierce rivalry, and attempts to eliminate Clark and Chloe when they start to uncover his sinister plans.
Season 4 Episodes
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The Hero Heart
Crusade
Gone
Emergency Contacts
Facade
Heartbeats and Deadbeats
Rash Decisions
Devoted
Breathing Lessons
Run
Misdiagnosis Murder
Transference
Vaccinations
Jinx
Temperature's Rising
Spell
Speculum for a Heavyweight
Bound
Bad Liver
Scare
Maternal Mirrors
Unsafe
Jeaneology
Pariah
Skin
Recruit
Love and Let Die
Krypto
Coming Clean
Sacred
Lucy
Prescriptions
Onyx
Seize the Day
Ears, Ho's and Threat
Spirit
Weights and Measures
Blank
The Real World Rittenhouse
Ageless
Identity Crisis
Forever
Quarantine
Commencement