Season 2 saw a fundamental change in Sydney's character, allegedly introduced in order to give the show more action. In the first season, Sydney almost never kills, preferring fisticuffs and tranquilizer guns to deadly blows and real bullets. Starting this season, she behaves more like a stereotypical spy, usually killing enemies and rarely using tranq guns. Although there were some minor incidents prior, the episode "Phase One" is generally considered to mark the arrival of this new version of Sydney. While some fans have criticized this change in Sydney's character, others have suggested that it might have been influenced by the arrival of her mother. During season 2 Sydney also begins to dress and act more sexually to achieve her goals.