Dario Delacio

It's the day of Chloe and Jimmy's dream wedding. Chloe is excited that she's marrying Jimmy but is worried that Davis will stop the wedding. Meanwhile, Oliver tells Clark he thinks he has discovered where Lex is hiding and takes off to Cuba to confront him. When he arrives, however, Oliver is shocked to find Lana (former series star Kristin Kreuk) instead. Clark and Lois grow closer but chaos ensues when Doomsday crashes the wedding and tries to kidnap Chloe.

Linda Lake (guest star Tori Spelling - "Beverly Hills, 90210," "90210," "Tori & Dean") returns to Metropolis and threatens to expose Clark's secret unless he promises to give her exclusive information on the red-blue blur so she can become a star reporter again. Refusing to be blackmailed, Clark tells Lois his secret and asks her to write his story for the Daily Planet.

DC Comics' Legion of Superheroes arrives in Smallville from the future to help Clark stop Brainiac and the Persuader.

Tess orchestrates an explosion on a private jet to get Clark to reveal his powers. Meanwhile, Davis discovers a surprising way to control the monster within.

Oliver tells Clark he must kill Davis, 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 takes on Tess, but the fight takes a shocking turn. Meanwhile, Chloe gets caught in the middle of Oliver and Clark's battle over killing Davis.