The Green Arrow sends out for reinforcements and Bart Allen, a.k.a. Impulse, Arthur Curry (Aquaman) and Victor Stone (Cyborg) return to Smallville to help him take down LuthorCorp's secret lab called 'Project 33.1'. During a break-in at the LuthorCorp facility, Bart is captured and tortured by Lex for information to who hired him. Clark sets off to rescue him but is felled by kryptonite. An alarmed Chloe goes to Oliver for help, and the newly formed "justice league" springs into action to rescue Clark and Bart. Meanwhile, Oliver painfully decides to break up with Lois, feeling that his dedication to justice is more important, but he leaves out that information from her.