Smallville Season 7, Episode 11, "Siren," features the debut of Alaina Huffman as Black Canary, who is hired by Lex Luthor to target Green Arrow. According to the Talk Ville Podcast, the episode highlights the unsustainable nature of Clark and Lana's relationship, metaphorically compared to trying to repair an old car. For more insights, visit Talk Ville Podcast . Clana: A Comparison to an Old Car