Ep 5. Doppelganger

Sydney Bristow works for SD-6, a secret organization that she believes to be a branch of the CIA. In reality, SD-6 is actually a criminal organization that has been manipulating Sydney and using her as a double agent. In episode 5 of season 1, entitled "Doppelganger," Sydney must deal with the consequences of her double life when SD-6 tasks her with securing a prototype of a new weapon.

After an intense mission in Paris, Sydney is tasked with helping to steal the prototype from a physics research facility in Iran. The catch? She must do it without being detected by the researchers who work there. In order to accomplish this, Sydney takes on another guise, that of a physicist named Julia Thorne. As Julia, Sydney must not only steal the prototype undetected, but also act convincingly enough to avoid arousing suspicion from the facility's staff.

Unfortunately for Sydney, things don't go as planned when she discovers that she has a doppelganger, a woman named Anna Espinosa who is also working for SD-6. Anna is tasked with securing the same prototype, and when she arrives at the facility, she becomes suspicious of Julia's presence.

As the two women play a cat and mouse game, each trying to outwit the other, Sydney should be concerned that Anna might discover her secret identity as a double agent. Meanwhile, Anna's presence places Sydney's own life in danger, and the two women engage in a tense standoff as each tries to secure the prototype for their respective employers.

At the same time, Sydney's personal life becomes more complicated as her friendship with her CIA handler, Vaughn, becomes more complicated. Sydney must navigate her emotions as she deals with her feelings for him and her vows of loyalty to SD-6.

As the tension mounts, Sydney must rely on her wits and training to stay one step ahead of Anna and keep her double life secret from both SD-6 and the CIA. Will she be able to complete her mission and secure the prototype, while also maintaining the trust of her handlers on both sides? "Doppelganger" is a thrilling episode that showcases Sydney's skills as a spy, and the emotional turmoil that comes with living a double life.