Tom Welling Clark Kent Actor Michael Rosenbaum Lex Luthor Actor Kristin Kreuk Lana Lang Actor Sam Jones III Pete Ross Actor Allison Mack Chloe Sullivan Actor John Schneider Jonathan Kent Actor Annette O'Toole Martha Kent Actor John Glover Lionel Luthor Guest Star Emmanuelle Vaugier Dr. Helen Bryce Guest Star Rob LaBelle Dr. Fredrick Walden Guest Star Patrick Cassidy Henry Small Guest Star Camille Mitchell Sheriff Nancy Adams Guest Star Sarah-Jane Redmond Nell Potter Guest Star Rekha Sharma Dr. Harden Guest Star Julian Christopher Dr. MacIntyre Guest Star Catherine Barroll Betty Fordman Guest Star Mitchell Kosterman Sheriff Ethan Miller Guest Star Eileen Pedde Jennifer Small Guest Star Barclay Hope Doctor Guest Star Kwesi Ameyaw Lex's Security Guard Darius Guest Star Alfred Gough Executive Producer, Writer Miles Millar Executive Producer, Writer Greg Beeman Director James Marshall Director Rick Rosenthal Director Terrence O'Hara Director Rick Wallace Director Chris Long Director Thomas J. Wright Director Steve Miner Director Brian Wayne Peterson Writer Mark Verheiden Writer Todd Slavkin Writer Ken Biller Writer Jeph Loeb Writer Kelly Souders Writer Darren Swimmer Writer Philip Levens Writer