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Smallville – Season 4, Episode 19: Full Cast & Crew Aired Apr 27, 2005 Drama/Action/Adventure/Fantasy
When Clark loses his memory, Chloe must teach him about his superpowers while keeping him from accidentally revealing his secret to others; Lex takes advantage of Clark and persuades him to show where the three stones are hidden. TV-PG Air Date: Apr 27, 2005 See TV Episode Details

Cast & Crew

All Cast Crew
Tom Welling Clark Kent Actor Kristin Kreuk Lana Lang Actor Michael Rosenbaum Lex Luthor Actor Allison Mack Chloe Sullivan Actor John Schneider Jonathan Kent Actor Annette O'Toole Martha Kent Actor John Glover Lionel Luthor Actor Jensen Ackles Jason Teague Actor Erica Durance Lois Lane Guest Star Jonathan Bennett Kevin Grady Guest Star Tom Butler Lawrence Grady Guest Star Camille Mitchell Sheriff Nancy Adams Guest Star Heather Doerksen Receptionist Guest Star Ryan King Dillon Grady Guest Star Alfred Gough Executive Producer Miles Millar Executive Producer Jeannot Szwarc Director Brian Wayne Peterson Writer Kelly Souders Writer