Smallville :

Tess has assembled a team of meteor freaks, including Plastique, to track down Davis so Clark can kill him. However, things get out of hand once Tess' team discovers she is double-crossing them. Chloe returns and begs Clark to kill Davis, claiming he can no longer keep the beast under control.

Tess discovers that Clark's plan to use black kryptonite to seperate Davis from Doomsday and send him into the Phantom Zone. After hearing a disembodied voice claiming to be from Kandor that emanates from the Kryptonian orb she has, Tess takes the crystal that opens the Phantom Zone and destroys it. Tess tells Clark that he has to destroyl Doomsday. Oliver finally confesses to Clark that he was the one that killed Lex, which forces Clark to question who Oliver has become if he's willing to take another man's life.