Alias was definitely all over the map during its fourth season, and a few off-screen factors managed to take their toll onscreen as well. The end of a real-life relationship between Garner and Vartan gave Sydney and Vaughn's scenes a lack of romantic spark, but at the same time a decided tension, as the two warily circled each other and deepened their relationship; they clicked best in the episode "Welcome to Liberty Village," in which the duo infiltrates a Stepford-like suburb as a picture-perfect couple. And the absence of Lena Olin, as Syd's mother, was definitely felt, as her character became a looming presence despite little screen time. Where Alias succeeded this year was in the dramatic impact individual episodes had: "Nocturne" was a captivating tale of Sydney in the throes of deadly hallucinations; "The Orphan" affectingly fleshed out the enigmatic Nadia's background; "In Dreams" (directed by Garner) probed the subconscious of bad guy Sloane, who wasn't as evil as you might think; and "Mirage" forced Sydney to impersonate her mother in her father's fevered dreams. Don't worry, there was plenty of action--especially in the season's final episodes, which prominently featured a deadly Sonia Braga--and despite its ups and downs, Alias remained one of the most intelligent, compelling dramas on television. --Mark Englehart