Following are episodes that aired as part of season 6 of Smallville.
601. Zod
Clark is imprisoned in the Phantom Zone, deprived of his powers.
• Thu, Sep 28, 2006
• Directed by James Marshall
• Written by: Steven S. DeKnight
• Cast: Tom Welling (Clark Kent). Kristin Kreuk (Lana Lang). Michael Rosenbaum (Lex Luthor/Zod). Erica Durance (Lois Lane). Allison Mack (Chloe Sullivan). John Glover (Lionel Luthor). Annette O'Toole (Martha Kent). Aaron Ashmore (Jimmy Olsen). Leonard Roberts (Nam-Ek). Pascale Hutton (Raya). Terence Stamp (Jor-El (voice)). James Marsters (Milton Fine (archive footage) (uncredited)).
602. Sneeze
Clark thinks he's developed a cold, but it turns out to be a symptom of a new superpower; Lois gets a job at the Inquisitor, a local tabloid; Lana moves in with Lex, who suspects someone is stalking him.
• Thu, Oct 5, 2006
• Directed by Paul Shapiro
• Writer: Todd Slavkin and Darren Swimmer
• Cast: Tom Welling (Clark Kent). Kristin Kreuk (Lana Lang). Michael Rosenbaum (Lex Luthor). Erica Durance (Lois Lane). Allison Mack (Chloe Sullivan). John Glover (Lionel Luthor). Annette O'Toole (Martha Kent). Lochlyn Munro (Orlando Block). Justin Hartley (Oliver Queen). Brendan Penny (Wagner). Emy Aneke (Robert Pontius).
603. Wither
A guilt-ridden Lex throws a charity ball for the town and hires the All-American Rejects to perform; Clark and Chloe pursue a creature who uses male human bodies to spawn, and the hunt intensifies after the creature abducts Jimmy Olsen; Lois reluctantly agrees to go with Oliver Queen (Justin Hartley) to Lex's ball.
• Thu, Oct 12, 2006
• Directed by Whitney Ransick
• Written by: Tracy Bellomo
• Cast: Tom Welling (Clark Kent). Kristin Kreuk (Lana Lang). Michael Rosenbaum (Lex Luthor). Erica Durance (Lois Lane). Allison Mack (Chloe Sullivan). John Glover (Lionel Luthor*). Annette O'Toole (Martha Kent). Aaron Ashmore (Jimmy Olsen). Amber McDonald (Gloria). Justin Hartley (Oliver Queen). Darren E. Scott (Doctor). Chelsea Florko (Jenny). Jake LeDoux (Paul Bennett). Carrie Anne Fleming (Becky). Danielle Kremeniuk (EMT #1). Randal Edwards (EMT #2).
604. Arrow
The Green Arrow (Justin Hartley) draws the attention of Lois after she sees him steal a rare diamond necklace off Martha's neck; Clark discovers Oliver Queen's secret; Lex mends fences with his father to test Lana's loyalty.
• Thu, Oct 19, 2006
• Directed by Michael Rohl
• Written by: Brian Wayne Peterson and Kelly Souders
• Cast: Tom Welling (Clark Kent). Kristin Kreuk (Lana Lang). Michael Rosenbaum (Lex Luthor). Erica Durance (Lois Lane). Allison Mack (Chloe Sullivan). John Glover (Lionel Luthor). Annette O'Toole (Martha Kent). David McIlwraith (Milo). Justin Hartley (Oliver Queen/The Green Arrow). Bill Mondy (Dr. Groll). French Tickner (Simon Westcott). Samantha Zaharia (Candice Westcott). Jay Hindle (Mr. Queen (uncredited)).
605. Reunion
An old prep-school incident involving the apparent death of a schoolmate returns to haunt Lex and Oliver (Justin Hartley), and the consequences could be deadly.
• Thu, Oct 26, 2006
• Directed by Jeannot Szwarc
• Written by: Steven S. DeKnight
• Cast: Tom Welling (Clark Kent). Kristin Kreuk (Lana Lang). Michael Rosenbaum (Lex Luthor). Erica Durance (Lois Lane). Allison Mack (Chloe Sullivan). John Glover (Lionel Luthor). Annette O'Toole (Martha Kent). Lucas Grabeel (Young Lex). Bryce Hodgson (Young Duncan Allenmeyer). Ryan Overton (Young Oliver). Justin Hartley (Oliver Queen). Devin Drewitz (Young Alden). Sebastian Gacki (Alden). Reece Daniel Thompson (Young Geoffrey). Clifton Murray (Geoffrey). Rekha Sharma (Dr. Harden).
606. Fallout
Clark and Raya (Pascale Hutton) face another escapee from the Phantom Zone, Baern (Bow Wow), who knows the secret of the Kryptonian Black Box and will be unstoppable if he accesses its power.
• Thu, Nov 2, 2006
• Directed by Glen Winter
• Written by: Holly Harold
• Cast: Tom Welling (Clark Kent). Kristin Kreuk (Lana Lang). Michael Rosenbaum (Lex Luthor). Erica Durance (Lois Lane*). Allison Mack (Chloe Sullivan). John Glover (Lionel Luthor*). Annette O'Toole (Martha Kent). Aaron Ashmore (Jimmy Olsen). Pascale Hutton (Raya). Bow Wow (Baern/Lamar Johnson). Bill Mondy (Dr. Groll). Brandon Jay McLaren (Yance). Julian D. Christopher (Dr. MacIntyre). Chris Shields).
607. Rage
Lex is covertly involved in the production of an experimental drug that Oliver Queen (Justin Hartley) is taking.
• Thu, Nov 9, 2006
• Directed by James Marshall
• Written by: Todd Slavkin and Darren Swimmer
• Cast: Tom Welling (Clark Kent). Kristin Kreuk (Lana Lang). Michael Rosenbaum (Lex Luthor). Erica Durance (Lois Lane). Allison Mack (Chloe Sullivan). John Glover (Lionel Luthor). Annette O'Toole (Martha Kent). Justin Hartley (Oliver Queen/The Green Arrow). Carrie Genzel (Dr. Pamela Black). Brandon Blue (Pierced Punk). Fred Henderson (Dr. Langston). Brad Turner (Lt. Bledsoe). Holly Hougham (Female Victim). James Michalopoulos (Prisoner). Darren E. Scott (Security Guard (uncredited)).
