Johann Fennhoff

Johann Fennhoff is a psychiatrist and a member of Leviathan. He is portrayed by Ralph Brown.

Agent Carter
Johann Fennhoff helped many wounded soldiers during World War II. Because of its ability Leviathan decides to capture him. He was reluctant to join Leviathan but when he saw how they killed a man for refusing, he decides to join them to save the life of his family.

Three years later, Fennhoff called himself as Ivchenko. When Peggy Carter, Jack Thompson and the Howling Commandos had infiltrated the Red Room Academy, he posed as a prisoner of Leviathan. After being releaseb by Carter, Thompson and Howling Commandos, Nikola went crazy and took hostage Happy Sam Sawyer; Ivchenko then shot and killed his cellmate. Having escaped from Leviathan's soldiers, Dugan gave to Ivchenko bottle of whiskey that Peggy had given to him. Ivchenko met with Chief Roger Dooley after arriving in the United States.

A day later, Ivchenko and Dooley met again; at this meeting tries to hypnotize the Chief without success. Later, Sousa informs Dooley about Carter's true alliance, Dooley then orders Yauch to take of Ivchenko as he was the star witness of the SSR against Howard Stark. Ivchenko got to know the different evacuation points after hypnotized Yauch. As a final instruction Ivchenko ordered Yauch to commit suicide. Shortly after, Carter saw Ivchenko was communicating with someone in another building.

After Carter confessed to Dooley the reasons why she helped Stark, the Chief then sent agents to arrest the person who was in the other building; while he was in charge to arrest Ivchenko. Dooley was hypnotized by Ivchenko before he could arrest him. Dooley then locks Jarvis and Carter in a room at the request of Ivchenko. Already uninterrupted. Dooley gives Item 17 to Ivchenko. Before leaving, Ivchenko asked Dooley to put the Self-Heating Vest as last instruction. Later, he and Underwood went to a cinema to test Item 17.

Trivia

 * In the comics, Dr. Johann Fennhoff was brilliant psychiatrist who took the codename of Doctor Faustus.