In this special episode, Oliver Queen (Justin Hartley), aka the Green Arrow, sends out for reinforcements -- and Bart Allen (Kyle Gallner), aka Impulse; Arthur "AC" Curry (Alan Ritchson), aka Aquaman; and Victor Stone (Lee Thompson Young), aka Cyborg, return to Smallville to help Oliver take down a secret LuthorCorp laboratory. During a break-in at the facility, Bart is captured and tortured by Lex, but when Clark tries to rescue him, he is felled by meteor rock. An alarmed Chloe goes to Oliver for help, and the newly formed league springs into action to rescue Clark and Bart.

Season 6 | Episode 11

Allison Mack

Chloe Sullivan

Annette O'Toole

Martha Kent

Erica Durance

Lois Lane

John Schneider

Jonathan Kent

Kristin Kreuk

Lana Lang

Michael Rosenbaum

Lex Luthor

Tom Welling

Clark Kent