Haakon Chevalier was a French literature professor at Berkeley and close friend of J. Robert Oppenheimer. In this interview, Chevalier discusses aspects of Oppenheimer’s personal life, including his romantic relationships and family, hobbies including Sanskrit, and religious views. He recalls how Oppenheimer became involved in politics on the Berkeley campus. He also discusses who was present for his infamous conversation with Oppenheimer, in which Chevalier told Oppie he knew a way to pass scientific secrets to the Soviets. This conversation played a key role in the security trial.