The Green Arrow sends out for reinforcements and Bart Allan, a.k.a. The Flash (Impulse), Aquaman and Cyborg return to Smallville to help him take down LuthorCorp's secret lab. During a break-in at the LuthorCorp facility, Bart is captured and tortured by Lex and Clark sets off to rescue him but is felled by meteor rock. An alarmed Chloe goes to Oliver for help and the newly formed "justice league" springs into action to rescue Clark and Bart.