While adjusting to their new lives in Smallville, Lois and Clark make an important decision concerning one of their sons. Meanwhile, tensions begin to rise between Lois and Morgan Edge. Lastly, Lana Lang Cushing invites the Kent family over for a barbecue.

Lois and Clark struggle as a couple while Chrissy adjusts to running The Smallville Gazette with Lois. Jonathan faces new challenges on the football field, and secrets threaten to destroy Jordan and Sarah's growing relationship. Meanwhile, Kyle grows concerned over Lana's involvement with a new mayoral candidate. Lastly, John Henry Irons and his daughter Natalie attempt to make this new Earth their home.

Superman races through the portal after Ally Allston, but when he arrives on the other side, he discovers everything on this parallel earth is... bizarre. Navigating his way through deceivingly familiar faces and landscapes, Superman goes on one wild ride in his fight to stop Ally from merging.

Chrissy Beppo, with the authorization of the Department of Defense, has a message for the people of Smallville, not only is the merging of planets real, it is happening.

Lois' undercover assignment reveals a deadly foe that promises to change the Kent family forever. Meanwhile, the Kent boys find themselves being pulled in opposite directions.

All of Smallville comes together to view a meteor shower, and Lex Luthor makes his move to take down Superman and Lois.

Superman is in a brutal battle with Luthor's monster; Lois and the boys race to save General Lane.

Reeling from failure, Jordan begins to spiral; Jonathan discovers newfound strength.

Luthor challenges Lois to a live telecast debate, though not everything is as it seems; John Henry and Clark face a troubling possibility.

The Kents fight with everything they have as Luthor makes his final move on Smallville.