Smallville 3x3 Extinction Season 3 Season 0 0 EpisodesSeason 1 21 EpisodesSeason 2 23 EpisodesSeason 3 22 EpisodesSeason 4 22 EpisodesSeason 5 22 EpisodesSeason 6 22 EpisodesSeason 7 20 EpisodesSeason 8 22 EpisodesSeason 9 21 EpisodesSeason 10 21 Episodes 3x1 - Exile 3x2 - Phoenix 3x3 - Extinction 3x4 - Slumber 3x5 - Perry 3x6 - Relic 3x7 - Magnetic 3x8 - Shattered 3x9 - Asylum 3x10 - Whisper 3x11 - Delete 3x12 - Hereafter 3x13 - Velocity 3x14 - Obsession 3x15 - Resurrection 3x16 - Crisis 3x17 - Legacy 3x18 - Truth 3x19 - Memoria 3x20 - Talisman 3x21 - Forsaken (1) 3x22 - Covenant (2) Clark discovers someone is hunting people affected by the kryptonite rocks and the killer's next target is Lex. Clark uses his powers to save Lex, but is caught off guard when the killer learns his weakness and shoots him with a kryptonite bullet.