S01E04: X-Ray
Clark begins experiencing "vision problems" as his x-ray vision begins manifesting. Meanwhile a mysterious shapeshifter is going about town using his or her abilities to steal and get others in trouble.
Previous Episode 
Season 1
Pilot
S1E1 / 16 Oct 2001
Metamorphosis
S1E2 / 23 Oct 2001
Hothead
S1E3 / 30 Oct 2001
X-Ray
S1E4 / 06 Nov 2001
Cool
S1E5 / 13 Nov 2001
Hourglass
S1E6 / 20 Nov 2001
Craving
S1E7 / 27 Nov 2001
Jitters
S1E8 / 11 Dec 2001
Rogue
S1E9 / 15 Jan 2002
Shimmer
S1E10 / 29 Jan 2002
Hug
S1E11 / 05 Feb 2002
Leech
S1E12 / 12 Feb 2002
Kinetic
S1E13 / 26 Feb 2002
Zero
S1E14 / 12 Mar 2002
Nicodemus
S1E15 / 19 Mar 2002
Stray
S1E16 / 16 Apr 2002
Reaper
S1E17 / 23 Apr 2002
Drone
S1E18 / 30 Apr 2002
Crush
S1E19 / 07 May 2002
Obscura
S1E20 / 14 May 2002
Tempest
S1E21 / 21 May 2002
Season 2
Vortex
S2E1 / 24 Sep 2002
Heat
S2E2 / 01 Oct 2002
Duplicity
S2E3 / 08 Oct 2002
Red
S2E4 / 15 Oct 2002
Nocturne
S2E5 / 22 Oct 2002
Redux
S2E6 / 29 Oct 2002
Lineage
S2E7 / 05 Nov 2002
Ryan
S2E8 / 12 Nov 2002
Dichotic
S2E9 / 19 Nov 2002
Skinwalker
S2E10 / 26 Nov 2002
Visage
S2E11 / 14 Jan 2003
Insurgence
S2E12 / 21 Jan 2003
Suspect
S2E13 / 28 Jan 2003
Rush
S2E14 / 04 Feb 2003
Prodigal
S2E15 / 11 Feb 2003
Fever
S2E16 / 18 Feb 2003
Rosetta
S2E17 / 25 Feb 2003
Visitor
S2E18 / 15 Apr 2003
Precipice
S2E19 / 22 Apr 2003
Witness
S2E20 / 29 Apr 2003
Accelerate
S2E21 / 06 May 2003
Calling
S2E22 / 13 May 2003
Exodus
S2E23 / 20 May 2003
Season 3
Exile
S3E1 / 01 Oct 2003
Phoenix
S3E2 / 08 Oct 2003
Extinction
S3E3 / 15 Oct 2003
Slumber
S3E4 / 22 Oct 2003
Perry
S3E5 / 29 Oct 2003
Relic
S3E6 / 05 Nov 2003
Magnetic
S3E7 / 12 Nov 2003
Shattered
S3E8 / 19 Nov 2003
Asylum
S3E9 / 14 Jan 2004
Whisper
S3E10 / 21 Jan 2004
Delete
S3E11 / 28 Jan 2004
Hereafter
S3E12 / 04 Feb 2004
Velocity
S3E13 / 11 Feb 2004
Obsession
S3E14 / 18 Feb 2004
Resurrection
S3E15 / 25 Feb 2004
Crisis
S3E16 / 03 Mar 2004
Legacy
S3E17 / 14 Apr 2004
Truth
S3E18 / 21 Apr 2004
Memoria
S3E19 / 28 Apr 2004
Talisman
S3E20 / 05 May 2004
Forsaken (1)
S3E21 / 12 May 2004
Covenant (2)
S3E22 / 19 May 2004
Season 4
Crusade
S4E1 / 22 Sep 2004
Gone
S4E2 / 29 Sep 2004
Facade
S4E3 / 06 Oct 2004
Devoted
S4E4 / 13 Oct 2004
Run
S4E5 / 20 Oct 2004
Transference
S4E6 / 27 Oct 2004
Jinx
S4E7 / 03 Nov 2004
Spell
S4E8 / 10 Nov 2004
Bound
S4E9 / 17 Nov 2004
Scare
S4E10 / 01 Dec 2004
Unsafe
S4E11 / 26 Jan 2005
Pariah
S4E12 / 02 Feb 2005
Recruit
S4E13 / 09 Feb 2005
Krypto
S4E14 / 16 Feb 2005
Sacred
S4E15 / 23 Feb 2005
Lucy
S4E16 / 02 Mar 2005
Onyx
S4E17 / 13 Apr 2005
Spirit
S4E18 / 20 Apr 2005
Blank
S4E19 / 27 Apr 2005
Ageless
S4E20 / 04 May 2005
Forever
S4E21 / 11 May 2005
Commencement
S4E22 / 18 May 2005
Season 5
Arrival
S5E1 / 29 Sep 2005
Mortal
S5E2 / 06 Oct 2005
Hidden
S5E3 / 13 Oct 2005
Aqua
S5E4 / 20 Oct 2005
Thirst
S5E5 / 27 Oct 2005
Exposed
S5E6 / 03 Nov 2005
Splinter
S5E7 / 10 Nov 2005
Solitude
S5E8 / 17 Nov 2005
Lexmas
S5E9 / 08 Dec 2005
Fanatic
S5E10 / 12 Jan 2006
Lockdown
S5E11 / 19 Jan 2006
Reckoning
S5E12 / 26 Jan 2006
Vengeance
S5E13 / 02 Feb 2006
Tomb
S5E14 / 09 Feb 2006
Cyborg
S5E15 / 16 Feb 2006
Hypnotic
S5E16 / 30 Mar 2006
Void
S5E17 / 06 Apr 2006
Fragile
S5E18 / 13 Apr 2006
Mercy
S5E19 / 20 Apr 2006
Fade
S5E20 / 27 Apr 2006
Oracle
S5E21 / 04 May 2006
Vessel
S5E22 / 11 May 2006
Season 6
Zod
S6E1 / 28 Sep 2006
Sneeze
S6E2 / 05 Oct 2006
Wither
S6E3 / 12 Oct 2006
Arrow
S6E4 / 19 Oct 2006
Reunion
S6E5 / 26 Oct 2006
Fallout
S6E6 / 02 Nov 2006
Rage
S6E7 / 09 Nov 2006
Static
S6E8 / 16 Nov 2006
Subterranean
S6E9 / 07 Dec 2006
Hydro
S6E10 / 11 Jan 2007
Justice
S6E11 / 18 Jan 2007
Labyrinth
S6E12 / 25 Jan 2007
Crimson
S6E13 / 01 Feb 2007
Trespass
S6E14 / 08 Feb 2007
Freak
S6E15 / 15 Feb 2007
Promise
S6E16 / 15 Mar 2007
Combat
S6E17 / 22 Mar 2007
Progeny
S6E18 / 19 Apr 2007
Nemesis
S6E19 / 26 Apr 2007
Noir
S6E20 / 03 May 2007
Prototype
S6E21 / 10 May 2007
Phantom
S6E22 / 17 May 2007
Season 7
Bizarro
S7E1 / 27 Sep 2007
Kara
S7E2 / 04 Oct 2007
Fierce
S7E3 / 11 Oct 2007
Cure
S7E4 / 18 Oct 2007
Action
S7E5 / 25 Oct 2007
Lara
S7E6 / 01 Nov 2007
Wrath
S7E7 / 08 Nov 2007
Blue
S7E8 / 15 Nov 2007
Gemini
S7E9 / 13 Dec 2007
Persona
S7E10 / 31 Jan 2008
Siren
S7E11 / 07 Feb 2008
Fracture
S7E12 / 14 Feb 2008
Hero
S7E13 / 13 Mar 2008
Traveler
S7E14 / 20 Mar 2008
Veritas
S7E15 / 27 Mar 2008
Descent
S7E16 / 17 Apr 2008
Sleeper
S7E17 / 24 Apr 2008
Apocalypse
S7E18 / 01 May 2008
Quest
S7E19 / 08 May 2008
Arctic
S7E20 / 15 May 2008
Season 8
Odyssey
S8E1 / 18 Sep 2008
Plastique
S8E2 / 25 Sep 2008
Toxic
S8E3 / 02 Oct 2008
Instinct
S8E4 / 09 Oct 2008
Committed
S8E5 / 16 Oct 2008
Prey
S8E6 / 23 Oct 2008
Identity
S8E7 / 30 Oct 2008
Bloodline
S8E8 / 06 Nov 2008
Abyss
S8E9 / 13 Nov 2008
Bride
S8E10 / 20 Nov 2008
Legion
S8E11 / 15 Jan 2009
Bulletproof
S8E12 / 22 Jan 2009
Power
S8E13 / 29 Jan 2009
Requiem
S8E14 / 05 Feb 2009
Infamous
S8E15 / 12 Mar 2009
Turbulence
S8E16 / 19 Mar 2009
Hex
S8E17 / 26 Mar 2009
Eternal
S8E18 / 02 Apr 2009
Stiletto
S8E19 / 23 Apr 2009
Beast
S8E20 / 30 Apr 2009
Injustice
S8E21 / 07 May 2009
Doomsday
S8E22 / 14 May 2009
Season 9
Savior
S9E1 / 25 Sep 2009
Metallo
S9E2 / 02 Oct 2009
Rabid
S9E3 / 09 Oct 2009
Echo
S9E4 / 16 Oct 2009
Roulette
S9E5 / 23 Oct 2009
Crossfire
S9E6 / 30 Oct 2009
Kandor
S9E7 / 06 Nov 2009
Idol
S9E8 / 13 Nov 2009
Pandora
S9E9 / 20 Nov 2009
Disciple
S9E10 / 29 Jan 2010
Absolute Justice
S9E11 / 05 Feb 2010
Warrior
S9E12 / 12 Feb 2010
Persuasion
S9E13 / 19 Feb 2010
Conspiracy
S9E14 / 26 Feb 2010
Escape
S9E15 / 02 Apr 2010
Checkmate
S9E16 / 09 Apr 2010
Upgrade
S9E17 / 16 Apr 2010
Charade
S9E18 / 23 Apr 2010
Sacrifice
S9E19 / 30 Apr 2010
Hostage
S9E20 / 07 May 2010
Salvation
S9E21 / 14 May 2010
Season 10
Lazarus
S10E1 / 24 Sep 2010
Shield
S10E2 / 01 Oct 2010
Supergirl
S10E3 / 08 Oct 2010
Homecoming
S10E4 / 15 Oct 2010
Isis
S10E5 / 22 Oct 2010
Harvest
S10E6 / 29 Oct 2010
Ambush
S10E7 / 05 Nov 2010
Abandoned
S10E8 / 12 Nov 2010
Patriot
S10E9 / 19 Nov 2010
Luthor
S10E10 / 03 Dec 2010
Icarus
S10E11 / 10 Dec 2010
Collateral
S10E12 / 04 Feb 2011
Beacon
S10E13 / 11 Feb 2011
Masquerade
S10E14 / 18 Feb 2011
Fortune
S10E15 / 25 Feb 2011
Scion
S10E16 / 04 Mar 2011
Kent
S10E17 / 15 Apr 2011
Booster
S10E18 / 22 Apr 2011
Dominion
S10E19 / 29 Apr 2011
Prophecy
S10E20 / 06 May 2011
Finale
S10E21 / 13 May 2011
Tom Welling
Clark Kent
Erica Durance
Lois Lane
Cassidy Freeman
Tess Mercer
