Ep 6. Nocturne

Sydney Bristow has had her fair share of challenges as a CIA operative, but in "Nocturne," she faces one of her darkest missions yet. The episode opens on a tense scene, as Sydney and her team work to intercept a shipment of chemical weapons being smuggled into the country. Despite their best efforts, the weapons end up in the hands of a dangerous terrorist group known only as "The Covenant."

As Sydney and her team investigate The Covenant's plans for the chemicals, they begin to unravel a web of intrigue that involves one of Sydney's former allies, Anna Espinosa. Anna, who was believed to be dead, has resurfaced and is working with The Covenant to develop a deadly virus that could wipe out millions of people.

Sydney is forced to work with Anna, who has a personal vendetta against her, to uncover The Covenant's plans and prevent the virus from being released. Throughout the episode, the tension between Sydney and Anna is palpable, as they both navigate their complicated history while trying to stay focused on their mission.

As the episode progresses, Sydney and Anna's relationship becomes increasingly fraught, with Anna using every opportunity to undermine Sydney and her team. However, Sydney remains focused on her task, and with the help of her team and her own resourcefulness, she is able to stop The Covenant's plan and prevent the virus from being released.

"Nocturne" is a tense and action-packed episode that showcases Sydney's strength and resilience as an agent, as well as her willingness to put aside personal grudges for the greater good. It also highlights the ongoing theme of redemption and second chances that runs throughout the series, as Anna is given the opportunity to make amends for her past actions and help stop a greater evil.

Overall, "Nocturne" is a standout episode in Season 4 of Alias, showcasing the show's trademark blend of high-stakes action, complex relationships, and compelling storytelling. Fans of the series will no doubt find this installment to be a thrilling and satisfying addition to the show's canon.