CLARK AND DOOMSDAY FACE OFF — Oliver (Justin Hartley) tells Clark (Tom Welling) he must kill Davis (Sam Witwer), as Doomsday is a serious threat and must be stopped at all costs. However, Clark struggles with taking a human life, so the Green Arrow and his team decide to take matters into their own hands. Lois (Erica Durance) takes on Tess (Cassidy Freeman), but the fight takes a shocking turn. Meanwhile, Chloe (Allison Mack) gets caught in the middle of Oliver and Clark’s battle over killing Davis.
THE GREEN ARROW CALLS ON THE FLASH, AQUAMAN AND CYBORG TO FORM A LEAGUE OF SUPERHEROES – The Green Arrow (Justin Hartley) sends out for reinforcements and Bart Allan, a.k.a. The Flash (guest star Kyle Gallner), Aquaman (guest star Alan Ritchson) and Cyborg (guest star Lee Thompson Young) 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 (Michael Rosenbaum) and Clark (Tom Welling) sets off to rescue him but is felled by meteor rock. An alarmed Chloe (Allison Mack) goes to Oliver for help, and the newly formed “justice league” springs into action to rescue Clark and Bart.
THE FLASH SPEEDS INTO SMALLVILLE – After Jonathan’s (John Schneider) wallet is stolen, Clark (Tom Welling) super-speeds after the thief but is stunned when he cannot catch him. The thief, Bart, a.k.a. The Flash, later shows up at the farm and tries to talk Clark into leaving Smallville for a life on the road together, flexing their super powers. Meanwhile, Lex (Michael Rosenbaum) buys a priceless framed manuscript with Kryptonian symbols and Clark learns that it contains a mysterious hidden map. However, when Bart steals the manuscript from Lex, he inadvertently puts Clark’s life in danger and must make the decision whether to save Clark or himself.