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 Eric Johnson Whitney Fordman Actor George Murdock Old Harry Bollston Guest Star Eric Christian Olsen Young Harry Bollston Guest Star Jackie Burroughs Cassandra Carver Guest Star Lisa Calder Zoe Garfield Guest Star Alf Humphreys Jim Gage Guest Star Mitchell Kosterman Sheriff Ethan Miller Guest Star Reg Tupper Doctor Guest Star Lois Dellar Nurse Guest Star Alfred Gough Executive Producer Miles Millar Executive Producer Doris Egan Writer Chris Long Director