Smallville 7x16 Descent Season 7 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 7x1 - Bizarro 7x2 - Kara 7x3 - Fierce 7x4 - Cure 7x5 - Action 7x6 - Lara 7x7 - Wrath 7x8 - Blue 7x9 - Gemini 7x10 - Persona 7x11 - Siren 7x12 - Fracture 7x13 - Hero 7x14 - Traveler 7x15 - Veritas 7x16 - Descent 7x17 - Sleeper 7x18 - Apocalypse 7x19 - Quest 7x20 - Arctic No one is safe when Lex seeks the secret of Veritas, and Clark tries to stop him.