Ep 6. A Sin to Err

Peggy and the SSR team continue their investigation into the theft of Stark technology and the involvement of Leviathan. In episode 6, 'A Sin to Err', Peggy discovers that her former colleague, Dr. Ivchenko, may be connected to Leviathan and sets out to find him. Meanwhile, Agent Thompson confronts Peggy about her loyalty and Jarvis' past comes back to haunt him.

The episode begins with Peggy tracking down the address of a former Soviet spy and assassin who may be connected to Leviathan. She enlists the help of Jarvis to sneak into the building and search for any clues. However, they are discovered by the assassin and a fight ensues. Peggy manages to escape with a file containing information about Dr. Ivchenko, the psychotherapist who treated Howard Stark after the war and is now working with the SSR.

Peggy shares her suspicions with Sousa and they approach Dr. Ivchenko, who denies any involvement with Leviathan. However, Peggy is not convinced and decides to follow him. She witnesses him meeting with the assassin and realizes that they are planning an attack on the SSR. She tries to warn the team, but they do not believe her and instead suspect her of being a double agent.

Agent Thompson takes the opportunity to question Peggy about her loyalty and brings up her relationship with Steve Rogers. Peggy stands her ground and defends her actions, but Thompson tells her that he no longer trusts her. Meanwhile, Jarvis receives a phone call from his former employer, who threatens to reveal his criminal past unless he helps him escape from the country.

As the episode comes to a close, the team discovers that Peggy was right and that Dr. Ivchenko is indeed working with Leviathan. They team up to stop the attack on the SSR, but not before a major betrayal occurs. The episode ends with Peggy questioning who she can trust and what lies ahead in her fight against Leviathan.

Overall, 'A Sin to Err' is an action-packed episode with plenty of twists and turns. Peggy's loyalty is questioned by the team and she faces new challenges as she uncovers more about the conspiracy. The episode sets up a tense and exciting finale for the season.