Oliver Queen arrived in Smallville when he was revealed to be the thief who stole Martha Kent's necklace as a green thied. Lois was constantly obsessed with figuring out the thief's identity. While trying to figure out his identity, she was kidnapped by his enemies and tortured. Even after Lois was rrescued by the thief himself, she still attempted to unmask his identity. Luckily, Clark was able to intervene. Not long after Lois met Oliver Queen, boy billionaire, and the two began to date.