Smallville 2x18 Visitor Season 2 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 2x1 - Vortex 2x2 - Heat 2x3 - Duplicity 2x4 - Red 2x5 - Nocturne 2x6 - Redux 2x7 - Lineage 2x8 - Ryan 2x9 - Dichotic 2x10 - Skinwalker 2x11 - Visage 2x12 - Insurgence 2x13 - Suspect 2x14 - Rush 2x15 - Prodigal 2x16 - Fever 2x17 - Rosseta 2x18 - Visitor 2x19 - Precipice 2x20 - Witness 2x21 - Accelerate 2x22 - Calling 2x23 - Exodus After a schoolmate claims to be an alien and proves it by using heat vision, Clark investigates and believes the boy is from Krypton. Meanwhile, Helen confronts Lex over the locked room in the mansion that holds his investigation of Clark's secrets.