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Zod and his soldiers launch an attack on Earth leaving, Clark and Zod to face off in an epic battle. Chloe gets some reinforcements to help defeat the Kandorians. Meanwhile, Zod poses as the Blur with Lois and asks her to steal the Book of Rao from Clark, Tess clings to life after attempting to stop Zod, and Oliver disappears after trying to help Chloe defeat the aliens using Watchtower.

Much to Clark's surprise, Martha Kent returns to Smallville with her new boyfriend, Perry White in tow. Lois and Perry realize they are both working on the same story about the Red Queen, and decide to team up, which ultimately puts them in serious danger. Chloe helps Clark search for the Book of Rao, which they believe contains information on how to stop Zod and his army.

While Chloe and Tess are trapped inside Watchtower, Oliver confronts Zod and winds up clinging to life - and Clark realizes that Zod has given his soldiers super powers.

While investigating the early prison release of ex-District Attorney Raymond Sacks, Lois is threatened by Sacks. While saving Lois, the Blur is caught on camera by someone who tries to sell the photos to Sacks. As they attempt to stop the sale, Lois and Clark encounter Maxwell Lord, a Checkmate agent who also wants the photos. Meanwhile, Chloe learns Zod's true nature.

While investigating a secret lab, an explosion occurs and Lois is rescued by John Corben. While investigating, Clark is exposed to red kryptonite and takes Zod to the Fortress. Meanwhile, Tess and Chloe send in Corben to stop Clark from revealing all his secrets.

Tess kidnaps Green Arrow and takes him to Amanda Waller, but he escapes before they can reveal who he really is. While investigating Oliver's kidnapping, Clark finds John Jones investigating the kidnapping. Waller then kidnaps and threatens to kill Chloe if Clark doesn't reveal the names and location of the Justice League.

Clark and Lois head out of town for a quiet romantic getaway, but their plans are thwarted when they run into Chloe and Oliver at their Bed & Breakfast Inn. The couples' awkward moment is interrupted by the arrival of the Silver Banshee, who sets her sights on Clark and Oliver. Meanwhile, Tess faces off with Zod with a surprising result.

Bernard Chisholm, a doctor who died and was brought back to life by the Kandorians so they can experiment on him, escapes and kidnaps some Kandorians in order to prove aliens have invaded Earth. Bernard tries to get Lois to write a story validating his claim, but when Lois refuses, he kidnaps her too. In an effort to save his people, Zod poses as a reporter from the Daily Planet and uncovers Bernard's secret lab. Clark arrives at the lab just in time to see Zod get shot.

When Clark is exposed to gemstone kryptonite on Valentine's Day, he unwittingly gains the ability to make wishes come true... and chaos results as Lois agrees to have a traditional relationship, and Chloe vows to watch out over Clark and protect him from Lois.

Zatanna goes to a comic book convention to find an enchanted comic book and asks Clark for his help. While Lois sees them together and becomes jealous, Chloe is rescued from an accident by a teenager who has acquired the comic book and used it to become Warrior Angel.

A man named Sylvester asks Chloe and her team of superheroes for help but ends up getting attacked and killed. Clark is led to former headquarters of the Justice Society of America where he meets up with Dr. Fate, Hawkman, and Star Girl. Later on, Clark, John Jones, Green Arrow, and Chloe team up to help the JSA stop the killer before he murders someone else in the group. Meanwhile, Lois receives a package from a mysterious agency called Checkmate.

Oliver's former mentor, the Dark Archer, seeks revenge on his pupil and launches attacks on Chloe, Lois, and Mia as part of his plan. When Oliver is driven to his limits and beyond, Clark must come to the aid of his friend.

Tess kidnaps Lois to find out where Lois went after she disappeared for weeks. Lois's memory of the future depicts a Metropolis under Zod's rule and Clark powerless under the red sun, while Chloe forms a resistance group with Oliver. After learning of these future events, Clark makes an important decision about Zod.

Zan and Jayna come to Metropolis and assist The Blur with his fight to take down crime but several of their rescue attempts fail, which leads Clark in trouble with the District Attorney.

It's a race against time to find Jor-El when Clark realizes that he is on Earth and Zod realizes that he could hold the key to their powers. Chloe is the first to meet him, while Zod enlists Tess.

Oliver offers to train a new girl, Mia, to keep her safe from danger. Lois and Clark are stunned when a radio station want both of them to be their new hosts.

A woman forces Oliver to play in a dangerous game and then turns up dead. The police believe Oliver is responsible and arrest him. Meanwhile, Lois confronts Clark over his knowledge about Oliver's suicide attempt.

Tess forces Oliver to come to a Queen Industries gala to put the Board at ease, but things go awry when the Toyman shows up with a bomb and a plan to take revenge on Oliver.

Lois' new colleague, John Corben, undergoes a horrific transformation when he awakens from an accident with superhuman strength and a heart made of kryptonite. Determined to use his new power to further his vendetta against the Blur, Corben sets out kill the vigilante. However, the situation becomes even more complicated when Lois' own investigation leads her into Corben's hands.

Clark decides that he is ready to start his training at the Fortress, but Jor-El insists that he return to Metropolis to cut his ties with Lois before he begins. Lois reappears in the city with no recollection of vanishing, and her investigation into a monorail crash brings her into contact with a new reporter named John Corben... who is opposed to the Red and Blue Blur. Meanwhile, Chloe's friendship with Clark deteriorates when he refuses to use the Legion ring to save Jimmy; Oliver turns down a dark path, and Zod makes his entrance at the Luthor mansion.