 Subsequently, Koch filmed "Fog in August" (by director Kai Wessel), the first feature film to address the Nazis' euthanasia program and the hospital's staunch Nazi chief physician Werner Veithausen's (played by Koch) way of dealing with the issue.Eventually, in 2015, Koch began shooting the fifth season of the Showtime series "Homeland" about bipolar CIA Officer Carrie Mathison (Claire Danes).After leaving the CIA Carrie now works for German billionaire Otto Düring (Koch), a philanthropist who uses the money his family made through affiliation with the Nazis to help struggling people around the world, including in volatile regions of the Middle East.