eason five of Smallville, an American television series, began airing on September 29, 2005. 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. The fifth season comprises 22 episodes and concluded its initial airing on May 11, 2006, marking the final season that aired on The WB. Regular cast members during season five include Tom Welling, Kristin Kreuk, Michael Rosenbaum, Allison Mack, John Glover, Erica Durance, Annette O'Toole and John Schneider.

Season 5 deals with the aftermath of the second meteor shower. Clark deals with adult life, going to college, a real relationship with Lana, and the loss of someone he loves. His distrust for Lex continues to grow, as Clark's professor begins supplying him with evidence of LuthorCorp's secret projects. Clark looks to Chloe for support, while Lionel's transformation into a better person draws skepticism from everyone. Jensen Ackles, who played Jason Teague, left the show after season four, and Erica Durance became a series regular as Lois Lane. The writers also brought in Arthur Curry, Victor Stone, and Andrea Rojas, DC Comics superheroes, in three separate guest spots as well as the classic Superman villain Brainiac.

Overview from themoviedb.org