<P> In the season five premiere, Clark interrupts his training to return to Smallville, but when he fails to return to the Fortress before the Sun sets, he is stripped of his powers . In the episode "Hidden", Clark begins an honest relationship with Lana, but is killed trying to save the town from a resident who hopes to kill all of the "...meteor freaks". Jor - El resurrects Clark, but warns him that someone he loves will eventually have to take his place . Clark worries about who will be sacrificed in return for him being saved . In the episode "Reckoning", Lana is killed . Unwilling to accept this, Clark turns back time to save her . As a result, it is Clark's adoptive father that becomes the sacrifice when he suffers a fatal heart attack . In the season five finale, Clark battles Brainiac (James Marsters), a Kryptonian artificial intelligence in the form of a man . Clark fights to stop Brainiac from releasing the Kryptonian criminal Zod from the Phantom Zone . Clark fails, and becomes himself imprisoned in the Phantom Zone, while Zod escapes and sets out to conquer Earth . </P> <P> In the season six premiere, Clark escapes the Phantom Zone--inadvertently releasing several of the prisoners in the process--and returns to Smallville, where he fights and defeats Zod . The other Phantom Zone escapees become Clark's primary focus in season six . He must also deal with Lana's romantic relationship with Lex, which culminates in their engagement in the season six episode "Promise". The season six finale reveals that the last of the Phantom Zone criminals is really a genetic experiment created by Kryptonian scientists . The escapee attacks Clark, cloning his DNA, and becomes Clark's doppelgänger . In the season seven premiere, Clark, together with John Jones (Phil Morris), defeats his doppelgänger . As the season continues, Clark discovers that a secret society known as Veritas was aware of his landing in Smallville during the first meteor shower and, moreover, possess a device that supposedly allows them to control him . In the season seven finale, Clark is confronted by Lex at the Fortress of Solitude . Lex has discovered Clark's secret and possesses the Veritas device, which he uses, resulting in the Fortress collapsing on him and Clark . </P> <P> In the season eight premiere, it is revealed that the Veritas device does not allow others to control Clark, but rather strips him of his powers . Wandering the globe with Russian gangsters, Clark is eventually found and rescued by Oliver Queen (Justin Hartley) and John Jones, with the latter restoring Clarks powers . During season eight, Clark uses his new job at the Daily Planet to access advance information, which he uses to stop crime around the city . In subsequent episodes, Clark adopts the name "Red - Blue Blur" as his superhero moniker . Toward the end of the season, Clark wrestles with the idea of having to kill Davis Bloome (Sam Witwer), a new friend, after discovering that Davis is actually Doomsday, a genetically engineered creature created by General Zod to kill Clark and destroy Earth . In the season eight finale, Clark finds a way to separate Davis' personality from that of Doomsday, and buries Doomsday a mile underground . When Davis subsequently kills Jimmy Olsen (Aaron Ashmore), Clark decides that his human - learned emotions have caused him the most trouble, as it was his compassion for Davis that led to Jimmy's death . He vows that "Clark Kent is dead". </P> <P> The start of season nine reveals that Clark has begun training with Jor - El, which is shown by his wearing his family crest on his chest when in his superhero persona . After realizing there are other Kryptonians on Earth, lacking special powers and led by Zod (Callum Blue), Clark decides to help them adjust to living as humans . When Zod is shot and killed, Clark uses his own blood to bring him back to life, resulting in Zod regaining his Kryptonian powers . Zod enables the other Kryptonians to regain their powers as well, and unites them to destroy the world in order to turn it into a new Krypton . This season, Lois and Clark begin a romantic relationship, while Lois also assists "The Blur" in his heroic endeavors . Clark kisses Lois while he is "the Blur" in the season nine finale and unknowingly reveals to her the truth . Afterward, he convinces the Kryptonians to leave Earth for a new, uninhabited planet . Clark then sacrifices his own life to send Zod through a portal, far away from Earth . </P>

When does clark become the red blue blur