The series recounts the early adventures of Kryptonian Clark Kent as he adjusts to life in the fictional town of Smallville, Kansas, during the years before he becomes Superman.

Season four chronicles Clark and his classmates' senior year of high school and centers on his attempt to unite the three stones of knowledge, and trying to cope with Lana's new relationship with Jason Teague.

At the end of season 3, Sam Jones III left the series as Pete Ross, and Jensen Ackles was brought in as Jason Teague and given star billing.

Writers also brought in other popular DC Comics characters, such as Bart Allen, Mister Mxyzptlk, and Sam and Lucy Lane.

[citation needed] The complete fourth season of Smallville was released on September 13, 2005, in North America.