StoryClark Kent's (Tom Welling) cousin Kara (Laura Vandervoort) -- aka Supergirl -- arrives on the scene for the seventh season of the hit television drama. Having just emerged from a 16-year state of suspended animation, Kara becomes entranced by popular culture. A strong-willed girl with all the powers of her cousin and more, she doesn't always see eye to eye with Clark. Meanwhile, a new editor (Michael Cassidy) takes over at the Daily Planet.
- "Supergirl: The Last Daughter of Krypton" Featurette - The definitive documentary covering the Supergirl character first popularized in the pages of DC Comics, and later manifested in a feature film, animation, and finally Smallville.
- "Jimmy on Jimmy" Featurette - Aaron Ashmore (Smallville's Jimmy Olson) meets with Marc McClure (1980's Superman: The Movie Jimmy Olson) who meets with Jack Larson (Jimmy from the 1950's The Adventures of Superman), and Sam Huntington (Superman Returns Jimmy) to create a fun "roundtable" of the Jimmys each chatting about their favorite subject of playing the role of Jimmy Olson!
- Smallville Legends Mobisodes Gallery - Computer animated short films covering the back-story of Kara Zor-El (aka Supergirl)
- Cast & Creator Commentaries - includes Executive Producers Alfred Gough & Miles Millar, and cast members John Glover & Justin Hartley.
- Comic Book
- Unaired Scenes
|Tom Welling||Clark Kent|
|Michael Rosenbaum||Lex Luthor|
|Kristin Kreuk||Lana Luthor|
|Allison Mack||Chloe Sullivan|
|Erica Durance||Lois Lane|
|Aaron Ashmore||Jimmy Olsen|
|John Glover||Lionel Luthor|
|Kim Coates||Special Agent Carter|
|Dean Cain||Curtis Knox, M.D.|
|Christina Milian||Rachel Davenport|
|Justin Hartley||Oliver Queen/Green Arrow|
|Alaina Huffman||Dinah Lance/Black Canary|
|Sam Jones III||Pete Ross|
- Justice Society Dec 27