Clark and Lois discover a spaceship belonging to Kara (Laura Vandervoort), the mysterious young woman who recently saved Lex. But before Clark and Lois can open it, Kara appears and knocks Lois unconscious. Clark is shocked when Kara tells him she is there to protect baby Kal-El. Kara left Krypton as a teenager, simultaneously with the infant Clark, and has unknowingly been in suspended animation ever since crash-landing in the dam, so she is now younger than him. Despite Kara's arrival, a despondent Clark decides that, without Lana, there is nothing keeping him in Smallville, so he heads to the Fortress of Solitude to begin his training. However, Jor-El tells him that Kara's father, Jor-El's brother, was evil, and Kara must be watched closely. Clark must stay in Smallville to find out why she came to Earth. Meanwhile, Lex makes a stunning discovery regarding Lana and Project 33.1.

Season 7 | Episode 2

Allison Mack

Chloe Sullivan

Annette O'Toole

Martha Kent

Erica Durance

Lois Lane

John Schneider

Jonathan Kent

Kristin Kreuk

Lana Lang

Michael Rosenbaum

Lex Luthor

Tom Welling

Clark Kent